remove async and add it as a package

3 files changed, 3 insertions, 5291 deletions

diff --git a/RPCTests/main.js b/RPCTests/main.js
index c235cb2ff..52f1b408d 100644
--- a/RPCTests/main.js
+++ b/RPCTests/main.js
@@ -2,7 +2,7 @@
 //requires installed node v6
 //requires ethereum eth path on input
 
-var async = require("./modules/async");
+var async = require("async");
 var utils = require('./modules/utils.js');
 var testutils = require('./modules/testutils.js');
 var ethconsole = require('./modules/ethconsole.js');
diff --git a/RPCTests/modules/async.js b/RPCTests/modules/async.js
deleted file mode 100644
index 282ff437b..000000000
--- a/RPCTests/modules/async.js
+++ /dev/null
@@ -1,5289 +0,0 @@
-(function (global, factory) {
-    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-    typeof define === 'function' && define.amd ? define(['exports'], factory) :
-    (factory((global.async = global.async || {})));
-}(this, (function (exports) { 'use strict';
-
-/**
- * A faster alternative to `Function#apply`, this function invokes `func`
- * with the `this` binding of `thisArg` and the arguments of `args`.
- *
- * @private
- * @param {Function} func The function to invoke.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {Array} args The arguments to invoke `func` with.
- * @returns {*} Returns the result of `func`.
- */
-function apply(func, thisArg, args) {
-  switch (args.length) {
-    case 0: return func.call(thisArg);
-    case 1: return func.call(thisArg, args[0]);
-    case 2: return func.call(thisArg, args[0], args[1]);
-    case 3: return func.call(thisArg, args[0], args[1], args[2]);
-  }
-  return func.apply(thisArg, args);
-}
-
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeMax = Math.max;
-
-/**
- * A specialized version of `baseRest` which transforms the rest array.
- *
- * @private
- * @param {Function} func The function to apply a rest parameter to.
- * @param {number} [start=func.length-1] The start position of the rest parameter.
- * @param {Function} transform The rest array transform.
- * @returns {Function} Returns the new function.
- */
-function overRest$1(func, start, transform) {
-  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
-  return function() {
-    var args = arguments,
-        index = -1,
-        length = nativeMax(args.length - start, 0),
-        array = Array(length);
-
-    while (++index < length) {
-      array[index] = args[start + index];
-    }
-    index = -1;
-    var otherArgs = Array(start + 1);
-    while (++index < start) {
-      otherArgs[index] = args[index];
-    }
-    otherArgs[start] = transform(array);
-    return apply(func, this, otherArgs);
-  };
-}
-
-/**
- * This method returns the first argument it receives.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Util
- * @param {*} value Any value.
- * @returns {*} Returns `value`.
- * @example
- *
- * var object = { 'a': 1 };
- *
- * console.log(_.identity(object) === object);
- * // => true
- */
-function identity(value) {
-  return value;
-}
-
-// Lodash rest function without function.toString()
-// remappings
-function rest(func, start) {
-    return overRest$1(func, start, identity);
-}
-
-var initialParams = function (fn) {
-    return rest(function (args /*..., callback*/) {
-        var callback = args.pop();
-        fn.call(this, args, callback);
-    });
-};
-
-function applyEach$1(eachfn) {
-    return rest(function (fns, args) {
-        var go = initialParams(function (args, callback) {
-            var that = this;
-            return eachfn(fns, function (fn, cb) {
-                fn.apply(that, args.concat(cb));
-            }, callback);
-        });
-        if (args.length) {
-            return go.apply(this, args);
-        } else {
-            return go;
-        }
-    });
-}
-
-/** Detect free variable `global` from Node.js. */
-var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
-
-/** Detect free variable `self`. */
-var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
-
-/** Used as a reference to the global object. */
-var root = freeGlobal || freeSelf || Function('return this')();
-
-/** Built-in value references. */
-var Symbol$1 = root.Symbol;
-
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/** Used to check objects for own properties. */
-var hasOwnProperty = objectProto.hasOwnProperty;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var nativeObjectToString = objectProto.toString;
-
-/** Built-in value references. */
-var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;
-
-/**
- * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the raw `toStringTag`.
- */
-function getRawTag(value) {
-  var isOwn = hasOwnProperty.call(value, symToStringTag$1),
-      tag = value[symToStringTag$1];
-
-  try {
-    value[symToStringTag$1] = undefined;
-    var unmasked = true;
-  } catch (e) {}
-
-  var result = nativeObjectToString.call(value);
-  if (unmasked) {
-    if (isOwn) {
-      value[symToStringTag$1] = tag;
-    } else {
-      delete value[symToStringTag$1];
-    }
-  }
-  return result;
-}
-
-/** Used for built-in method references. */
-var objectProto$1 = Object.prototype;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var nativeObjectToString$1 = objectProto$1.toString;
-
-/**
- * Converts `value` to a string using `Object.prototype.toString`.
- *
- * @private
- * @param {*} value The value to convert.
- * @returns {string} Returns the converted string.
- */
-function objectToString(value) {
-  return nativeObjectToString$1.call(value);
-}
-
-/** `Object#toString` result references. */
-var nullTag = '[object Null]';
-var undefinedTag = '[object Undefined]';
-
-/** Built-in value references. */
-var symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;
-
-/**
- * The base implementation of `getTag` without fallbacks for buggy environments.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the `toStringTag`.
- */
-function baseGetTag(value) {
-  if (value == null) {
-    return value === undefined ? undefinedTag : nullTag;
-  }
-  value = Object(value);
-  return (symToStringTag && symToStringTag in value)
-    ? getRawTag(value)
-    : objectToString(value);
-}
-
-/**
- * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
- * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an object, else `false`.
- * @example
- *
- * _.isObject({});
- * // => true
- *
- * _.isObject([1, 2, 3]);
- * // => true
- *
- * _.isObject(_.noop);
- * // => true
- *
- * _.isObject(null);
- * // => false
- */
-function isObject(value) {
-  var type = typeof value;
-  return value != null && (type == 'object' || type == 'function');
-}
-
-/** `Object#toString` result references. */
-var asyncTag = '[object AsyncFunction]';
-var funcTag = '[object Function]';
-var genTag = '[object GeneratorFunction]';
-var proxyTag = '[object Proxy]';
-
-/**
- * Checks if `value` is classified as a `Function` object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a function, else `false`.
- * @example
- *
- * _.isFunction(_);
- * // => true
- *
- * _.isFunction(/abc/);
- * // => false
- */
-function isFunction(value) {
-  if (!isObject(value)) {
-    return false;
-  }
-  // The use of `Object#toString` avoids issues with the `typeof` operator
-  // in Safari 9 which returns 'object' for typed arrays and other constructors.
-  var tag = baseGetTag(value);
-  return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
-}
-
-/** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER = 9007199254740991;
-
-/**
- * Checks if `value` is a valid array-like length.
- *
- * **Note:** This method is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
- * @example
- *
- * _.isLength(3);
- * // => true
- *
- * _.isLength(Number.MIN_VALUE);
- * // => false
- *
- * _.isLength(Infinity);
- * // => false
- *
- * _.isLength('3');
- * // => false
- */
-function isLength(value) {
-  return typeof value == 'number' &&
-    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
-}
-
-/**
- * Checks if `value` is array-like. A value is considered array-like if it's
- * not a function and has a `value.length` that's an integer greater than or
- * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
- * @example
- *
- * _.isArrayLike([1, 2, 3]);
- * // => true
- *
- * _.isArrayLike(document.body.children);
- * // => true
- *
- * _.isArrayLike('abc');
- * // => true
- *
- * _.isArrayLike(_.noop);
- * // => false
- */
-function isArrayLike(value) {
-  return value != null && isLength(value.length) && !isFunction(value);
-}
-
-/**
- * This method returns `undefined`.
- *
- * @static
- * @memberOf _
- * @since 2.3.0
- * @category Util
- * @example
- *
- * _.times(2, _.noop);
- * // => [undefined, undefined]
- */
-function noop() {
-  // No operation performed.
-}
-
-function once(fn) {
-    return function () {
-        if (fn === null) return;
-        var callFn = fn;
-        fn = null;
-        callFn.apply(this, arguments);
-    };
-}
-
-var iteratorSymbol = typeof Symbol === 'function' && Symbol.iterator;
-
-var getIterator = function (coll) {
-    return iteratorSymbol && coll[iteratorSymbol] && coll[iteratorSymbol]();
-};
-
-/**
- * The base implementation of `_.times` without support for iteratee shorthands
- * or max array length checks.
- *
- * @private
- * @param {number} n The number of times to invoke `iteratee`.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the array of results.
- */
-function baseTimes(n, iteratee) {
-  var index = -1,
-      result = Array(n);
-
-  while (++index < n) {
-    result[index] = iteratee(index);
-  }
-  return result;
-}
-
-/**
- * Checks if `value` is object-like. A value is object-like if it's not `null`
- * and has a `typeof` result of "object".
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
- * @example
- *
- * _.isObjectLike({});
- * // => true
- *
- * _.isObjectLike([1, 2, 3]);
- * // => true
- *
- * _.isObjectLike(_.noop);
- * // => false
- *
- * _.isObjectLike(null);
- * // => false
- */
-function isObjectLike(value) {
-  return value != null && typeof value == 'object';
-}
-
-/** `Object#toString` result references. */
-var argsTag = '[object Arguments]';
-
-/**
- * The base implementation of `_.isArguments`.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an `arguments` object,
- */
-function baseIsArguments(value) {
-  return isObjectLike(value) && baseGetTag(value) == argsTag;
-}
-
-/** Used for built-in method references. */
-var objectProto$3 = Object.prototype;
-
-/** Used to check objects for own properties. */
-var hasOwnProperty$2 = objectProto$3.hasOwnProperty;
-
-/** Built-in value references. */
-var propertyIsEnumerable = objectProto$3.propertyIsEnumerable;
-
-/**
- * Checks if `value` is likely an `arguments` object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an `arguments` object,
- *  else `false`.
- * @example
- *
- * _.isArguments(function() { return arguments; }());
- * // => true
- *
- * _.isArguments([1, 2, 3]);
- * // => false
- */
-var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
-  return isObjectLike(value) && hasOwnProperty$2.call(value, 'callee') &&
-    !propertyIsEnumerable.call(value, 'callee');
-};
-
-/**
- * Checks if `value` is classified as an `Array` object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array, else `false`.
- * @example
- *
- * _.isArray([1, 2, 3]);
- * // => true
- *
- * _.isArray(document.body.children);
- * // => false
- *
- * _.isArray('abc');
- * // => false
- *
- * _.isArray(_.noop);
- * // => false
- */
-var isArray = Array.isArray;
-
-/**
- * This method returns `false`.
- *
- * @static
- * @memberOf _
- * @since 4.13.0
- * @category Util
- * @returns {boolean} Returns `false`.
- * @example
- *
- * _.times(2, _.stubFalse);
- * // => [false, false]
- */
-function stubFalse() {
-  return false;
-}
-
-/** Detect free variable `exports`. */
-var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
-
-/** Detect free variable `module`. */
-var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
-
-/** Detect the popular CommonJS extension `module.exports`. */
-var moduleExports = freeModule && freeModule.exports === freeExports;
-
-/** Built-in value references. */
-var Buffer = moduleExports ? root.Buffer : undefined;
-
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;
-
-/**
- * Checks if `value` is a buffer.
- *
- * @static
- * @memberOf _
- * @since 4.3.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
- * @example
- *
- * _.isBuffer(new Buffer(2));
- * // => true
- *
- * _.isBuffer(new Uint8Array(2));
- * // => false
- */
-var isBuffer = nativeIsBuffer || stubFalse;
-
-/** Used as references for various `Number` constants. */
-var MAX_SAFE_INTEGER$1 = 9007199254740991;
-
-/** Used to detect unsigned integer values. */
-var reIsUint = /^(?:0|[1-9]\d*)$/;
-
-/**
- * Checks if `value` is a valid array-like index.
- *
- * @private
- * @param {*} value The value to check.
- * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
- * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
- */
-function isIndex(value, length) {
-  length = length == null ? MAX_SAFE_INTEGER$1 : length;
-  return !!length &&
-    (typeof value == 'number' || reIsUint.test(value)) &&
-    (value > -1 && value % 1 == 0 && value < length);
-}
-
-/** `Object#toString` result references. */
-var argsTag$1 = '[object Arguments]';
-var arrayTag = '[object Array]';
-var boolTag = '[object Boolean]';
-var dateTag = '[object Date]';
-var errorTag = '[object Error]';
-var funcTag$1 = '[object Function]';
-var mapTag = '[object Map]';
-var numberTag = '[object Number]';
-var objectTag = '[object Object]';
-var regexpTag = '[object RegExp]';
-var setTag = '[object Set]';
-var stringTag = '[object String]';
-var weakMapTag = '[object WeakMap]';
-
-var arrayBufferTag = '[object ArrayBuffer]';
-var dataViewTag = '[object DataView]';
-var float32Tag = '[object Float32Array]';
-var float64Tag = '[object Float64Array]';
-var int8Tag = '[object Int8Array]';
-var int16Tag = '[object Int16Array]';
-var int32Tag = '[object Int32Array]';
-var uint8Tag = '[object Uint8Array]';
-var uint8ClampedTag = '[object Uint8ClampedArray]';
-var uint16Tag = '[object Uint16Array]';
-var uint32Tag = '[object Uint32Array]';
-
-/** Used to identify `toStringTag` values of typed arrays. */
-var typedArrayTags = {};
-typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
-typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
-typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
-typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
-typedArrayTags[uint32Tag] = true;
-typedArrayTags[argsTag$1] = typedArrayTags[arrayTag] =
-typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
-typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
-typedArrayTags[errorTag] = typedArrayTags[funcTag$1] =
-typedArrayTags[mapTag] = typedArrayTags[numberTag] =
-typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
-typedArrayTags[setTag] = typedArrayTags[stringTag] =
-typedArrayTags[weakMapTag] = false;
-
-/**
- * The base implementation of `_.isTypedArray` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
- */
-function baseIsTypedArray(value) {
-  return isObjectLike(value) &&
-    isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
-}
-
-/**
- * The base implementation of `_.unary` without support for storing metadata.
- *
- * @private
- * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new capped function.
- */
-function baseUnary(func) {
-  return function(value) {
-    return func(value);
-  };
-}
-
-/** Detect free variable `exports`. */
-var freeExports$1 = typeof exports == 'object' && exports && !exports.nodeType && exports;
-
-/** Detect free variable `module`. */
-var freeModule$1 = freeExports$1 && typeof module == 'object' && module && !module.nodeType && module;
-
-/** Detect the popular CommonJS extension `module.exports`. */
-var moduleExports$1 = freeModule$1 && freeModule$1.exports === freeExports$1;
-
-/** Detect free variable `process` from Node.js. */
-var freeProcess = moduleExports$1 && freeGlobal.process;
-
-/** Used to access faster Node.js helpers. */
-var nodeUtil = (function() {
-  try {
-    return freeProcess && freeProcess.binding('util');
-  } catch (e) {}
-}());
-
-/* Node.js helper references. */
-var nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
-
-/**
- * Checks if `value` is classified as a typed array.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
- * @example
- *
- * _.isTypedArray(new Uint8Array);
- * // => true
- *
- * _.isTypedArray([]);
- * // => false
- */
-var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
-
-/** Used for built-in method references. */
-var objectProto$2 = Object.prototype;
-
-/** Used to check objects for own properties. */
-var hasOwnProperty$1 = objectProto$2.hasOwnProperty;
-
-/**
- * Creates an array of the enumerable property names of the array-like `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @param {boolean} inherited Specify returning inherited property names.
- * @returns {Array} Returns the array of property names.
- */
-function arrayLikeKeys(value, inherited) {
-  var isArr = isArray(value),
-      isArg = !isArr && isArguments(value),
-      isBuff = !isArr && !isArg && isBuffer(value),
-      isType = !isArr && !isArg && !isBuff && isTypedArray(value),
-      skipIndexes = isArr || isArg || isBuff || isType,
-      result = skipIndexes ? baseTimes(value.length, String) : [],
-      length = result.length;
-
-  for (var key in value) {
-    if ((inherited || hasOwnProperty$1.call(value, key)) &&
-        !(skipIndexes && (
-           // Safari 9 has enumerable `arguments.length` in strict mode.
-           key == 'length' ||
-           // Node.js 0.10 has enumerable non-index properties on buffers.
-           (isBuff && (key == 'offset' || key == 'parent')) ||
-           // PhantomJS 2 has enumerable non-index properties on typed arrays.
-           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
-           // Skip index properties.
-           isIndex(key, length)
-        ))) {
-      result.push(key);
-    }
-  }
-  return result;
-}
-
-/** Used for built-in method references. */
-var objectProto$5 = Object.prototype;
-
-/**
- * Checks if `value` is likely a prototype object.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
- */
-function isPrototype(value) {
-  var Ctor = value && value.constructor,
-      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$5;
-
-  return value === proto;
-}
-
-/**
- * Creates a unary function that invokes `func` with its argument transformed.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {Function} transform The argument transform.
- * @returns {Function} Returns the new function.
- */
-function overArg(func, transform) {
-  return function(arg) {
-    return func(transform(arg));
-  };
-}
-
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeKeys = overArg(Object.keys, Object);
-
-/** Used for built-in method references. */
-var objectProto$4 = Object.prototype;
-
-/** Used to check objects for own properties. */
-var hasOwnProperty$3 = objectProto$4.hasOwnProperty;
-
-/**
- * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
-function baseKeys(object) {
-  if (!isPrototype(object)) {
-    return nativeKeys(object);
-  }
-  var result = [];
-  for (var key in Object(object)) {
-    if (hasOwnProperty$3.call(object, key) && key != 'constructor') {
-      result.push(key);
-    }
-  }
-  return result;
-}
-
-/**
- * Creates an array of the own enumerable property names of `object`.
- *
- * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
- * for more details.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- * @example
- *
- * function Foo() {
- *   this.a = 1;
- *   this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.keys(new Foo);
- * // => ['a', 'b'] (iteration order is not guaranteed)
- *
- * _.keys('hi');
- * // => ['0', '1']
- */
-function keys(object) {
-  return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
-}
-
-function createArrayIterator(coll) {
-    var i = -1;
-    var len = coll.length;
-    return function next() {
-        return ++i < len ? { value: coll[i], key: i } : null;
-    };
-}
-
-function createES2015Iterator(iterator) {
-    var i = -1;
-    return function next() {
-        var item = iterator.next();
-        if (item.done) return null;
-        i++;
-        return { value: item.value, key: i };
-    };
-}
-
-function createObjectIterator(obj) {
-    var okeys = keys(obj);
-    var i = -1;
-    var len = okeys.length;
-    return function next() {
-        var key = okeys[++i];
-        return i < len ? { value: obj[key], key: key } : null;
-    };
-}
-
-function iterator(coll) {
-    if (isArrayLike(coll)) {
-        return createArrayIterator(coll);
-    }
-
-    var iterator = getIterator(coll);
-    return iterator ? createES2015Iterator(iterator) : createObjectIterator(coll);
-}
-
-function onlyOnce(fn) {
-    return function () {
-        if (fn === null) throw new Error("Callback was already called.");
-        var callFn = fn;
-        fn = null;
-        callFn.apply(this, arguments);
-    };
-}
-
-// A temporary value used to identify if the loop should be broken.
-// See #1064, #1293
-var breakLoop = {};
-
-function _eachOfLimit(limit) {
-    return function (obj, iteratee, callback) {
-        callback = once(callback || noop);
-        if (limit <= 0 || !obj) {
-            return callback(null);
-        }
-        var nextElem = iterator(obj);
-        var done = false;
-        var running = 0;
-
-        function iterateeCallback(err, value) {
-            running -= 1;
-            if (err) {
-                done = true;
-                callback(err);
-            } else if (value === breakLoop || done && running <= 0) {
-                done = true;
-                return callback(null);
-            } else {
-                replenish();
-            }
-        }
-
-        function replenish() {
-            while (running < limit && !done) {
-                var elem = nextElem();
-                if (elem === null) {
-                    done = true;
-                    if (running <= 0) {
-                        callback(null);
-                    }
-                    return;
-                }
-                running += 1;
-                iteratee(elem.value, elem.key, onlyOnce(iterateeCallback));
-            }
-        }
-
-        replenish();
-    };
-}
-
-/**
- * The same as [`eachOf`]{@link module:Collections.eachOf} but runs a maximum of `limit` async operations at a
- * time.
- *
- * @name eachOfLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.eachOf]{@link module:Collections.eachOf}
- * @alias forEachOfLimit
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A function to apply to each
- * item in `coll`. The `key` is the item's key, or index in the case of an
- * array. The iteratee is passed a `callback(err)` which must be called once it
- * has completed. If no error has occurred, the callback should be run without
- * arguments or with an explicit `null` argument. Invoked with
- * (item, key, callback).
- * @param {Function} [callback] - A callback which is called when all
- * `iteratee` functions have finished, or an error occurs. Invoked with (err).
- */
-function eachOfLimit(coll, limit, iteratee, callback) {
-  _eachOfLimit(limit)(coll, iteratee, callback);
-}
-
-function doLimit(fn, limit) {
-    return function (iterable, iteratee, callback) {
-        return fn(iterable, limit, iteratee, callback);
-    };
-}
-
-// eachOf implementation optimized for array-likes
-function eachOfArrayLike(coll, iteratee, callback) {
-    callback = once(callback || noop);
-    var index = 0,
-        completed = 0,
-        length = coll.length;
-    if (length === 0) {
-        callback(null);
-    }
-
-    function iteratorCallback(err) {
-        if (err) {
-            callback(err);
-        } else if (++completed === length) {
-            callback(null);
-        }
-    }
-
-    for (; index < length; index++) {
-        iteratee(coll[index], index, onlyOnce(iteratorCallback));
-    }
-}
-
-// a generic version of eachOf which can handle array, object, and iterator cases.
-var eachOfGeneric = doLimit(eachOfLimit, Infinity);
-
-/**
- * Like [`each`]{@link module:Collections.each}, except that it passes the key (or index) as the second argument
- * to the iteratee.
- *
- * @name eachOf
- * @static
- * @memberOf module:Collections
- * @method
- * @alias forEachOf
- * @category Collection
- * @see [async.each]{@link module:Collections.each}
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each
- * item in `coll`. The `key` is the item's key, or index in the case of an
- * array. The iteratee is passed a `callback(err)` which must be called once it
- * has completed. If no error has occurred, the callback should be run without
- * arguments or with an explicit `null` argument. Invoked with
- * (item, key, callback).
- * @param {Function} [callback] - A callback which is called when all
- * `iteratee` functions have finished, or an error occurs. Invoked with (err).
- * @example
- *
- * var obj = {dev: "/dev.json", test: "/test.json", prod: "/prod.json"};
- * var configs = {};
- *
- * async.forEachOf(obj, function (value, key, callback) {
- *     fs.readFile(__dirname + value, "utf8", function (err, data) {
- *         if (err) return callback(err);
- *         try {
- *             configs[key] = JSON.parse(data);
- *         } catch (e) {
- *             return callback(e);
- *         }
- *         callback();
- *     });
- * }, function (err) {
- *     if (err) console.error(err.message);
- *     // configs is now a map of JSON data
- *     doSomethingWith(configs);
- * });
- */
-var eachOf = function (coll, iteratee, callback) {
-    var eachOfImplementation = isArrayLike(coll) ? eachOfArrayLike : eachOfGeneric;
-    eachOfImplementation(coll, iteratee, callback);
-};
-
-function doParallel(fn) {
-    return function (obj, iteratee, callback) {
-        return fn(eachOf, obj, iteratee, callback);
-    };
-}
-
-function _asyncMap(eachfn, arr, iteratee, callback) {
-    callback = callback || noop;
-    arr = arr || [];
-    var results = [];
-    var counter = 0;
-
-    eachfn(arr, function (value, _, callback) {
-        var index = counter++;
-        iteratee(value, function (err, v) {
-            results[index] = v;
-            callback(err);
-        });
-    }, function (err) {
-        callback(err, results);
-    });
-}
-
-/**
- * Produces a new collection of values by mapping each value in `coll` through
- * the `iteratee` function. The `iteratee` is called with an item from `coll`
- * and a callback for when it has finished processing. Each of these callback
- * takes 2 arguments: an `error`, and the transformed item from `coll`. If
- * `iteratee` passes an error to its callback, the main `callback` (for the
- * `map` function) is immediately called with the error.
- *
- * Note, that since this function applies the `iteratee` to each item in
- * parallel, there is no guarantee that the `iteratee` functions will complete
- * in order. However, the results array will be in the same order as the
- * original `coll`.
- *
- * If `map` is passed an Object, the results will be an Array.  The results
- * will roughly be in the order of the original Objects' keys (but this can
- * vary across JavaScript engines)
- *
- * @name map
- * @static
- * @memberOf module:Collections
- * @method
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, transformed)` which must be called
- * once it has completed with an error (which can be `null`) and a
- * transformed item. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called when all `iteratee`
- * functions have finished, or an error occurs. Results is an Array of the
- * transformed items from the `coll`. Invoked with (err, results).
- * @example
- *
- * async.map(['file1','file2','file3'], fs.stat, function(err, results) {
- *     // results is now an array of stats for each file
- * });
- */
-var map = doParallel(_asyncMap);
-
-/**
- * Applies the provided arguments to each function in the array, calling
- * `callback` after all functions have completed. If you only provide the first
- * argument, `fns`, then it will return a function which lets you pass in the
- * arguments as if it were a single function call. If more arguments are
- * provided, `callback` is required while `args` is still optional.
- *
- * @name applyEach
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Array|Iterable|Object} fns - A collection of asynchronous functions
- * to all call with the same arguments
- * @param {...*} [args] - any number of separate arguments to pass to the
- * function.
- * @param {Function} [callback] - the final argument should be the callback,
- * called when all functions have completed processing.
- * @returns {Function} - If only the first argument, `fns`, is provided, it will
- * return a function which lets you pass in the arguments as if it were a single
- * function call. The signature is `(..args, callback)`. If invoked with any
- * arguments, `callback` is required.
- * @example
- *
- * async.applyEach([enableSearch, updateSchema], 'bucket', callback);
- *
- * // partial application example:
- * async.each(
- *     buckets,
- *     async.applyEach([enableSearch, updateSchema]),
- *     callback
- * );
- */
-var applyEach = applyEach$1(map);
-
-function doParallelLimit(fn) {
-    return function (obj, limit, iteratee, callback) {
-        return fn(_eachOfLimit(limit), obj, iteratee, callback);
-    };
-}
-
-/**
- * The same as [`map`]{@link module:Collections.map} but runs a maximum of `limit` async operations at a time.
- *
- * @name mapLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.map]{@link module:Collections.map}
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A function to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, transformed)` which must be called
- * once it has completed with an error (which can be `null`) and a transformed
- * item. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called when all `iteratee`
- * functions have finished, or an error occurs. Results is an array of the
- * transformed items from the `coll`. Invoked with (err, results).
- */
-var mapLimit = doParallelLimit(_asyncMap);
-
-/**
- * The same as [`map`]{@link module:Collections.map} but runs only a single async operation at a time.
- *
- * @name mapSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.map]{@link module:Collections.map}
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, transformed)` which must be called
- * once it has completed with an error (which can be `null`) and a
- * transformed item. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called when all `iteratee`
- * functions have finished, or an error occurs. Results is an array of the
- * transformed items from the `coll`. Invoked with (err, results).
- */
-var mapSeries = doLimit(mapLimit, 1);
-
-/**
- * The same as [`applyEach`]{@link module:ControlFlow.applyEach} but runs only a single async operation at a time.
- *
- * @name applyEachSeries
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.applyEach]{@link module:ControlFlow.applyEach}
- * @category Control Flow
- * @param {Array|Iterable|Object} fns - A collection of asynchronous functions to all
- * call with the same arguments
- * @param {...*} [args] - any number of separate arguments to pass to the
- * function.
- * @param {Function} [callback] - the final argument should be the callback,
- * called when all functions have completed processing.
- * @returns {Function} - If only the first argument is provided, it will return
- * a function which lets you pass in the arguments as if it were a single
- * function call.
- */
-var applyEachSeries = applyEach$1(mapSeries);
-
-/**
- * Creates a continuation function with some arguments already applied.
- *
- * Useful as a shorthand when combined with other control flow functions. Any
- * arguments passed to the returned function are added to the arguments
- * originally passed to apply.
- *
- * @name apply
- * @static
- * @memberOf module:Utils
- * @method
- * @category Util
- * @param {Function} function - The function you want to eventually apply all
- * arguments to. Invokes with (arguments...).
- * @param {...*} arguments... - Any number of arguments to automatically apply
- * when the continuation is called.
- * @example
- *
- * // using apply
- * async.parallel([
- *     async.apply(fs.writeFile, 'testfile1', 'test1'),
- *     async.apply(fs.writeFile, 'testfile2', 'test2')
- * ]);
- *
- *
- * // the same process without using apply
- * async.parallel([
- *     function(callback) {
- *         fs.writeFile('testfile1', 'test1', callback);
- *     },
- *     function(callback) {
- *         fs.writeFile('testfile2', 'test2', callback);
- *     }
- * ]);
- *
- * // It's possible to pass any number of additional arguments when calling the
- * // continuation:
- *
- * node> var fn = async.apply(sys.puts, 'one');
- * node> fn('two', 'three');
- * one
- * two
- * three
- */
-var apply$2 = rest(function (fn, args) {
-    return rest(function (callArgs) {
-        return fn.apply(null, args.concat(callArgs));
-    });
-});
-
-/**
- * Take a sync function and make it async, passing its return value to a
- * callback. This is useful for plugging sync functions into a waterfall,
- * series, or other async functions. Any arguments passed to the generated
- * function will be passed to the wrapped function (except for the final
- * callback argument). Errors thrown will be passed to the callback.
- *
- * If the function passed to `asyncify` returns a Promise, that promises's
- * resolved/rejected state will be used to call the callback, rather than simply
- * the synchronous return value.
- *
- * This also means you can asyncify ES2016 `async` functions.
- *
- * @name asyncify
- * @static
- * @memberOf module:Utils
- * @method
- * @alias wrapSync
- * @category Util
- * @param {Function} func - The synchronous function to convert to an
- * asynchronous function.
- * @returns {Function} An asynchronous wrapper of the `func`. To be invoked with
- * (callback).
- * @example
- *
- * // passing a regular synchronous function
- * async.waterfall([
- *     async.apply(fs.readFile, filename, "utf8"),
- *     async.asyncify(JSON.parse),
- *     function (data, next) {
- *         // data is the result of parsing the text.
- *         // If there was a parsing error, it would have been caught.
- *     }
- * ], callback);
- *
- * // passing a function returning a promise
- * async.waterfall([
- *     async.apply(fs.readFile, filename, "utf8"),
- *     async.asyncify(function (contents) {
- *         return db.model.create(contents);
- *     }),
- *     function (model, next) {
- *         // `model` is the instantiated model object.
- *         // If there was an error, this function would be skipped.
- *     }
- * ], callback);
- *
- * // es6 example
- * var q = async.queue(async.asyncify(async function(file) {
- *     var intermediateStep = await processFile(file);
- *     return await somePromise(intermediateStep)
- * }));
- *
- * q.push(files);
- */
-function asyncify(func) {
-    return initialParams(function (args, callback) {
-        var result;
-        try {
-            result = func.apply(this, args);
-        } catch (e) {
-            return callback(e);
-        }
-        // if result is Promise object
-        if (isObject(result) && typeof result.then === 'function') {
-            result.then(function (value) {
-                callback(null, value);
-            }, function (err) {
-                callback(err.message ? err : new Error(err));
-            });
-        } else {
-            callback(null, result);
-        }
-    });
-}
-
-/**
- * A specialized version of `_.forEach` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns `array`.
- */
-function arrayEach(array, iteratee) {
-  var index = -1,
-      length = array == null ? 0 : array.length;
-
-  while (++index < length) {
-    if (iteratee(array[index], index, array) === false) {
-      break;
-    }
-  }
-  return array;
-}
-
-/**
- * Creates a base function for methods like `_.forIn` and `_.forOwn`.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new base function.
- */
-function createBaseFor(fromRight) {
-  return function(object, iteratee, keysFunc) {
-    var index = -1,
-        iterable = Object(object),
-        props = keysFunc(object),
-        length = props.length;
-
-    while (length--) {
-      var key = props[fromRight ? length : ++index];
-      if (iteratee(iterable[key], key, iterable) === false) {
-        break;
-      }
-    }
-    return object;
-  };
-}
-
-/**
- * The base implementation of `baseForOwn` which iterates over `object`
- * properties returned by `keysFunc` and invokes `iteratee` for each property.
- * Iteratee functions may exit iteration early by explicitly returning `false`.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @returns {Object} Returns `object`.
- */
-var baseFor = createBaseFor();
-
-/**
- * The base implementation of `_.forOwn` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
-function baseForOwn(object, iteratee) {
-  return object && baseFor(object, iteratee, keys);
-}
-
-/**
- * The base implementation of `_.findIndex` and `_.findLastIndex` without
- * support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} predicate The function invoked per iteration.
- * @param {number} fromIndex The index to search from.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
-function baseFindIndex(array, predicate, fromIndex, fromRight) {
-  var length = array.length,
-      index = fromIndex + (fromRight ? 1 : -1);
-
-  while ((fromRight ? index-- : ++index < length)) {
-    if (predicate(array[index], index, array)) {
-      return index;
-    }
-  }
-  return -1;
-}
-
-/**
- * The base implementation of `_.isNaN` without support for number objects.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
- */
-function baseIsNaN(value) {
-  return value !== value;
-}
-
-/**
- * A specialized version of `_.indexOf` which performs strict equality
- * comparisons of values, i.e. `===`.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
-function strictIndexOf(array, value, fromIndex) {
-  var index = fromIndex - 1,
-      length = array.length;
-
-  while (++index < length) {
-    if (array[index] === value) {
-      return index;
-    }
-  }
-  return -1;
-}
-
-/**
- * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
-function baseIndexOf(array, value, fromIndex) {
-  return value === value
-    ? strictIndexOf(array, value, fromIndex)
-    : baseFindIndex(array, baseIsNaN, fromIndex);
-}
-
-/**
- * Determines the best order for running the functions in `tasks`, based on
- * their requirements. Each function can optionally depend on other functions
- * being completed first, and each function is run as soon as its requirements
- * are satisfied.
- *
- * If any of the functions pass an error to their callback, the `auto` sequence
- * will stop. Further tasks will not execute (so any other functions depending
- * on it will not run), and the main `callback` is immediately called with the
- * error.
- *
- * Functions also receive an object containing the results of functions which
- * have completed so far as the first argument, if they have dependencies. If a
- * task function has no dependencies, it will only be passed a callback.
- *
- * @name auto
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Object} tasks - An object. Each of its properties is either a
- * function or an array of requirements, with the function itself the last item
- * in the array. The object's key of a property serves as the name of the task
- * defined by that property, i.e. can be used when specifying requirements for
- * other tasks. The function receives one or two arguments:
- * * a `results` object, containing the results of the previously executed
- *   functions, only passed if the task has any dependencies,
- * * a `callback(err, result)` function, which must be called when finished,
- *   passing an `error` (which can be `null`) and the result of the function's
- *   execution.
- * @param {number} [concurrency=Infinity] - An optional `integer` for
- * determining the maximum number of tasks that can be run in parallel. By
- * default, as many as possible.
- * @param {Function} [callback] - An optional callback which is called when all
- * the tasks have been completed. It receives the `err` argument if any `tasks`
- * pass an error to their callback. Results are always returned; however, if an
- * error occurs, no further `tasks` will be performed, and the results object
- * will only contain partial results. Invoked with (err, results).
- * @returns undefined
- * @example
- *
- * async.auto({
- *     // this function will just be passed a callback
- *     readData: async.apply(fs.readFile, 'data.txt', 'utf-8'),
- *     showData: ['readData', function(results, cb) {
- *         // results.readData is the file's contents
- *         // ...
- *     }]
- * }, callback);
- *
- * async.auto({
- *     get_data: function(callback) {
- *         console.log('in get_data');
- *         // async code to get some data
- *         callback(null, 'data', 'converted to array');
- *     },
- *     make_folder: function(callback) {
- *         console.log('in make_folder');
- *         // async code to create a directory to store a file in
- *         // this is run at the same time as getting the data
- *         callback(null, 'folder');
- *     },
- *     write_file: ['get_data', 'make_folder', function(results, callback) {
- *         console.log('in write_file', JSON.stringify(results));
- *         // once there is some data and the directory exists,
- *         // write the data to a file in the directory
- *         callback(null, 'filename');
- *     }],
- *     email_link: ['write_file', function(results, callback) {
- *         console.log('in email_link', JSON.stringify(results));
- *         // once the file is written let's email a link to it...
- *         // results.write_file contains the filename returned by write_file.
- *         callback(null, {'file':results.write_file, 'email':'user@example.com'});
- *     }]
- * }, function(err, results) {
- *     console.log('err = ', err);
- *     console.log('results = ', results);
- * });
- */
-var auto = function (tasks, concurrency, callback) {
-    if (typeof concurrency === 'function') {
-        // concurrency is optional, shift the args.
-        callback = concurrency;
-        concurrency = null;
-    }
-    callback = once(callback || noop);
-    var keys$$1 = keys(tasks);
-    var numTasks = keys$$1.length;
-    if (!numTasks) {
-        return callback(null);
-    }
-    if (!concurrency) {
-        concurrency = numTasks;
-    }
-
-    var results = {};
-    var runningTasks = 0;
-    var hasError = false;
-
-    var listeners = {};
-
-    var readyTasks = [];
-
-    // for cycle detection:
-    var readyToCheck = []; // tasks that have been identified as reachable
-    // without the possibility of returning to an ancestor task
-    var uncheckedDependencies = {};
-
-    baseForOwn(tasks, function (task, key) {
-        if (!isArray(task)) {
-            // no dependencies
-            enqueueTask(key, [task]);
-            readyToCheck.push(key);
-            return;
-        }
-
-        var dependencies = task.slice(0, task.length - 1);
-        var remainingDependencies = dependencies.length;
-        if (remainingDependencies === 0) {
-            enqueueTask(key, task);
-            readyToCheck.push(key);
-            return;
-        }
-        uncheckedDependencies[key] = remainingDependencies;
-
-        arrayEach(dependencies, function (dependencyName) {
-            if (!tasks[dependencyName]) {
-                throw new Error('async.auto task `' + key + '` has a non-existent dependency in ' + dependencies.join(', '));
-            }
-            addListener(dependencyName, function () {
-                remainingDependencies--;
-                if (remainingDependencies === 0) {
-                    enqueueTask(key, task);
-                }
-            });
-        });
-    });
-
-    checkForDeadlocks();
-    processQueue();
-
-    function enqueueTask(key, task) {
-        readyTasks.push(function () {
-            runTask(key, task);
-        });
-    }
-
-    function processQueue() {
-        if (readyTasks.length === 0 && runningTasks === 0) {
-            return callback(null, results);
-        }
-        while (readyTasks.length && runningTasks < concurrency) {
-            var run = readyTasks.shift();
-            run();
-        }
-    }
-
-    function addListener(taskName, fn) {
-        var taskListeners = listeners[taskName];
-        if (!taskListeners) {
-            taskListeners = listeners[taskName] = [];
-        }
-
-        taskListeners.push(fn);
-    }
-
-    function taskComplete(taskName) {
-        var taskListeners = listeners[taskName] || [];
-        arrayEach(taskListeners, function (fn) {
-            fn();
-        });
-        processQueue();
-    }
-
-    function runTask(key, task) {
-        if (hasError) return;
-
-        var taskCallback = onlyOnce(rest(function (err, args) {
-            runningTasks--;
-            if (args.length <= 1) {
-                args = args[0];
-            }
-            if (err) {
-                var safeResults = {};
-                baseForOwn(results, function (val, rkey) {
-                    safeResults[rkey] = val;
-                });
-                safeResults[key] = args;
-                hasError = true;
-                listeners = [];
-
-                callback(err, safeResults);
-            } else {
-                results[key] = args;
-                taskComplete(key);
-            }
-        }));
-
-        runningTasks++;
-        var taskFn = task[task.length - 1];
-        if (task.length > 1) {
-            taskFn(results, taskCallback);
-        } else {
-            taskFn(taskCallback);
-        }
-    }
-
-    function checkForDeadlocks() {
-        // Kahn's algorithm
-        // https://en.wikipedia.org/wiki/Topological_sorting#Kahn.27s_algorithm
-        // http://connalle.blogspot.com/2013/10/topological-sortingkahn-algorithm.html
-        var currentTask;
-        var counter = 0;
-        while (readyToCheck.length) {
-            currentTask = readyToCheck.pop();
-            counter++;
-            arrayEach(getDependents(currentTask), function (dependent) {
-                if (--uncheckedDependencies[dependent] === 0) {
-                    readyToCheck.push(dependent);
-                }
-            });
-        }
-
-        if (counter !== numTasks) {
-            throw new Error('async.auto cannot execute tasks due to a recursive dependency');
-        }
-    }
-
-    function getDependents(taskName) {
-        var result = [];
-        baseForOwn(tasks, function (task, key) {
-            if (isArray(task) && baseIndexOf(task, taskName, 0) >= 0) {
-                result.push(key);
-            }
-        });
-        return result;
-    }
-};
-
-/**
- * A specialized version of `_.map` for arrays without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- */
-function arrayMap(array, iteratee) {
-  var index = -1,
-      length = array == null ? 0 : array.length,
-      result = Array(length);
-
-  while (++index < length) {
-    result[index] = iteratee(array[index], index, array);
-  }
-  return result;
-}
-
-/** `Object#toString` result references. */
-var symbolTag = '[object Symbol]';
-
-/**
- * Checks if `value` is classified as a `Symbol` primitive or object.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
- * @example
- *
- * _.isSymbol(Symbol.iterator);
- * // => true
- *
- * _.isSymbol('abc');
- * // => false
- */
-function isSymbol(value) {
-  return typeof value == 'symbol' ||
-    (isObjectLike(value) && baseGetTag(value) == symbolTag);
-}
-
-/** Used as references for various `Number` constants. */
-var INFINITY = 1 / 0;
-
-/** Used to convert symbols to primitives and strings. */
-var symbolProto = Symbol$1 ? Symbol$1.prototype : undefined;
-var symbolToString = symbolProto ? symbolProto.toString : undefined;
-
-/**
- * The base implementation of `_.toString` which doesn't convert nullish
- * values to empty strings.
- *
- * @private
- * @param {*} value The value to process.
- * @returns {string} Returns the string.
- */
-function baseToString(value) {
-  // Exit early for strings to avoid a performance hit in some environments.
-  if (typeof value == 'string') {
-    return value;
-  }
-  if (isArray(value)) {
-    // Recursively convert values (susceptible to call stack limits).
-    return arrayMap(value, baseToString) + '';
-  }
-  if (isSymbol(value)) {
-    return symbolToString ? symbolToString.call(value) : '';
-  }
-  var result = (value + '');
-  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
-}
-
-/**
- * The base implementation of `_.slice` without an iteratee call guard.
- *
- * @private
- * @param {Array} array The array to slice.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the slice of `array`.
- */
-function baseSlice(array, start, end) {
-  var index = -1,
-      length = array.length;
-
-  if (start < 0) {
-    start = -start > length ? 0 : (length + start);
-  }
-  end = end > length ? length : end;
-  if (end < 0) {
-    end += length;
-  }
-  length = start > end ? 0 : ((end - start) >>> 0);
-  start >>>= 0;
-
-  var result = Array(length);
-  while (++index < length) {
-    result[index] = array[index + start];
-  }
-  return result;
-}
-
-/**
- * Casts `array` to a slice if it's needed.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {number} start The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the cast slice.
- */
-function castSlice(array, start, end) {
-  var length = array.length;
-  end = end === undefined ? length : end;
-  return (!start && end >= length) ? array : baseSlice(array, start, end);
-}
-
-/**
- * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
- * that is not found in the character symbols.
- *
- * @private
- * @param {Array} strSymbols The string symbols to inspect.
- * @param {Array} chrSymbols The character symbols to find.
- * @returns {number} Returns the index of the last unmatched string symbol.
- */
-function charsEndIndex(strSymbols, chrSymbols) {
-  var index = strSymbols.length;
-
-  while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
-  return index;
-}
-
-/**
- * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
- * that is not found in the character symbols.
- *
- * @private
- * @param {Array} strSymbols The string symbols to inspect.
- * @param {Array} chrSymbols The character symbols to find.
- * @returns {number} Returns the index of the first unmatched string symbol.
- */
-function charsStartIndex(strSymbols, chrSymbols) {
-  var index = -1,
-      length = strSymbols.length;
-
-  while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
-  return index;
-}
-
-/**
- * Converts an ASCII `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
-function asciiToArray(string) {
-  return string.split('');
-}
-
-/** Used to compose unicode character classes. */
-var rsAstralRange = '\\ud800-\\udfff';
-var rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23';
-var rsComboSymbolsRange = '\\u20d0-\\u20f0';
-var rsVarRange = '\\ufe0e\\ufe0f';
-
-/** Used to compose unicode capture groups. */
-var rsZWJ = '\\u200d';
-
-/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
-var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']');
-
-/**
- * Checks if `string` contains Unicode symbols.
- *
- * @private
- * @param {string} string The string to inspect.
- * @returns {boolean} Returns `true` if a symbol is found, else `false`.
- */
-function hasUnicode(string) {
-  return reHasUnicode.test(string);
-}
-
-/** Used to compose unicode character classes. */
-var rsAstralRange$1 = '\\ud800-\\udfff';
-var rsComboMarksRange$1 = '\\u0300-\\u036f\\ufe20-\\ufe23';
-var rsComboSymbolsRange$1 = '\\u20d0-\\u20f0';
-var rsVarRange$1 = '\\ufe0e\\ufe0f';
-
-/** Used to compose unicode capture groups. */
-var rsAstral = '[' + rsAstralRange$1 + ']';
-var rsCombo = '[' + rsComboMarksRange$1 + rsComboSymbolsRange$1 + ']';
-var rsFitz = '\\ud83c[\\udffb-\\udfff]';
-var rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')';
-var rsNonAstral = '[^' + rsAstralRange$1 + ']';
-var rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}';
-var rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]';
-var rsZWJ$1 = '\\u200d';
-
-/** Used to compose unicode regexes. */
-var reOptMod = rsModifier + '?';
-var rsOptVar = '[' + rsVarRange$1 + ']?';
-var rsOptJoin = '(?:' + rsZWJ$1 + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*';
-var rsSeq = rsOptVar + reOptMod + rsOptJoin;
-var rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
-
-/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
-var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
-
-/**
- * Converts a Unicode `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
-function unicodeToArray(string) {
-  return string.match(reUnicode) || [];
-}
-
-/**
- * Converts `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
-function stringToArray(string) {
-  return hasUnicode(string)
-    ? unicodeToArray(string)
-    : asciiToArray(string);
-}
-
-/**
- * Converts `value` to a string. An empty string is returned for `null`
- * and `undefined` values. The sign of `-0` is preserved.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {string} Returns the converted string.
- * @example
- *
- * _.toString(null);
- * // => ''
- *
- * _.toString(-0);
- * // => '-0'
- *
- * _.toString([1, 2, 3]);
- * // => '1,2,3'
- */
-function toString(value) {
-  return value == null ? '' : baseToString(value);
-}
-
-/** Used to match leading and trailing whitespace. */
-var reTrim = /^\s+|\s+$/g;
-
-/**
- * Removes leading and trailing whitespace or specified characters from `string`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to trim.
- * @param {string} [chars=whitespace] The characters to trim.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {string} Returns the trimmed string.
- * @example
- *
- * _.trim('  abc  ');
- * // => 'abc'
- *
- * _.trim('-_-abc-_-', '_-');
- * // => 'abc'
- *
- * _.map(['  foo  ', '  bar  '], _.trim);
- * // => ['foo', 'bar']
- */
-function trim(string, chars, guard) {
-  string = toString(string);
-  if (string && (guard || chars === undefined)) {
-    return string.replace(reTrim, '');
-  }
-  if (!string || !(chars = baseToString(chars))) {
-    return string;
-  }
-  var strSymbols = stringToArray(string),
-      chrSymbols = stringToArray(chars),
-      start = charsStartIndex(strSymbols, chrSymbols),
-      end = charsEndIndex(strSymbols, chrSymbols) + 1;
-
-  return castSlice(strSymbols, start, end).join('');
-}
-
-var FN_ARGS = /^(function)?\s*[^\(]*\(\s*([^\)]*)\)/m;
-var FN_ARG_SPLIT = /,/;
-var FN_ARG = /(=.+)?(\s*)$/;
-var STRIP_COMMENTS = /((\/\/.*$)|(\/\*[\s\S]*?\*\/))/mg;
-
-function parseParams(func) {
-    func = func.toString().replace(STRIP_COMMENTS, '');
-    func = func.match(FN_ARGS)[2].replace(' ', '');
-    func = func ? func.split(FN_ARG_SPLIT) : [];
-    func = func.map(function (arg) {
-        return trim(arg.replace(FN_ARG, ''));
-    });
-    return func;
-}
-
-/**
- * A dependency-injected version of the [async.auto]{@link module:ControlFlow.auto} function. Dependent
- * tasks are specified as parameters to the function, after the usual callback
- * parameter, with the parameter names matching the names of the tasks it
- * depends on. This can provide even more readable task graphs which can be
- * easier to maintain.
- *
- * If a final callback is specified, the task results are similarly injected,
- * specified as named parameters after the initial error parameter.
- *
- * The autoInject function is purely syntactic sugar and its semantics are
- * otherwise equivalent to [async.auto]{@link module:ControlFlow.auto}.
- *
- * @name autoInject
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.auto]{@link module:ControlFlow.auto}
- * @category Control Flow
- * @param {Object} tasks - An object, each of whose properties is a function of
- * the form 'func([dependencies...], callback). The object's key of a property
- * serves as the name of the task defined by that property, i.e. can be used
- * when specifying requirements for other tasks.
- * * The `callback` parameter is a `callback(err, result)` which must be called
- *   when finished, passing an `error` (which can be `null`) and the result of
- *   the function's execution. The remaining parameters name other tasks on
- *   which the task is dependent, and the results from those tasks are the
- *   arguments of those parameters.
- * @param {Function} [callback] - An optional callback which is called when all
- * the tasks have been completed. It receives the `err` argument if any `tasks`
- * pass an error to their callback, and a `results` object with any completed
- * task results, similar to `auto`.
- * @example
- *
- * //  The example from `auto` can be rewritten as follows:
- * async.autoInject({
- *     get_data: function(callback) {
- *         // async code to get some data
- *         callback(null, 'data', 'converted to array');
- *     },
- *     make_folder: function(callback) {
- *         // async code to create a directory to store a file in
- *         // this is run at the same time as getting the data
- *         callback(null, 'folder');
- *     },
- *     write_file: function(get_data, make_folder, callback) {
- *         // once there is some data and the directory exists,
- *         // write the data to a file in the directory
- *         callback(null, 'filename');
- *     },
- *     email_link: function(write_file, callback) {
- *         // once the file is written let's email a link to it...
- *         // write_file contains the filename returned by write_file.
- *         callback(null, {'file':write_file, 'email':'user@example.com'});
- *     }
- * }, function(err, results) {
- *     console.log('err = ', err);
- *     console.log('email_link = ', results.email_link);
- * });
- *
- * // If you are using a JS minifier that mangles parameter names, `autoInject`
- * // will not work with plain functions, since the parameter names will be
- * // collapsed to a single letter identifier.  To work around this, you can
- * // explicitly specify the names of the parameters your task function needs
- * // in an array, similar to Angular.js dependency injection.
- *
- * // This still has an advantage over plain `auto`, since the results a task
- * // depends on are still spread into arguments.
- * async.autoInject({
- *     //...
- *     write_file: ['get_data', 'make_folder', function(get_data, make_folder, callback) {
- *         callback(null, 'filename');
- *     }],
- *     email_link: ['write_file', function(write_file, callback) {
- *         callback(null, {'file':write_file, 'email':'user@example.com'});
- *     }]
- *     //...
- * }, function(err, results) {
- *     console.log('err = ', err);
- *     console.log('email_link = ', results.email_link);
- * });
- */
-function autoInject(tasks, callback) {
-    var newTasks = {};
-
-    baseForOwn(tasks, function (taskFn, key) {
-        var params;
-
-        if (isArray(taskFn)) {
-            params = taskFn.slice(0, -1);
-            taskFn = taskFn[taskFn.length - 1];
-
-            newTasks[key] = params.concat(params.length > 0 ? newTask : taskFn);
-        } else if (taskFn.length === 1) {
-            // no dependencies, use the function as-is
-            newTasks[key] = taskFn;
-        } else {
-            params = parseParams(taskFn);
-            if (taskFn.length === 0 && params.length === 0) {
-                throw new Error("autoInject task functions require explicit parameters.");
-            }
-
-            params.pop();
-
-            newTasks[key] = params.concat(newTask);
-        }
-
-        function newTask(results, taskCb) {
-            var newArgs = arrayMap(params, function (name) {
-                return results[name];
-            });
-            newArgs.push(taskCb);
-            taskFn.apply(null, newArgs);
-        }
-    });
-
-    auto(newTasks, callback);
-}
-
-var hasSetImmediate = typeof setImmediate === 'function' && setImmediate;
-var hasNextTick = typeof process === 'object' && typeof process.nextTick === 'function';
-
-function fallback(fn) {
-    setTimeout(fn, 0);
-}
-
-function wrap(defer) {
-    return rest(function (fn, args) {
-        defer(function () {
-            fn.apply(null, args);
-        });
-    });
-}
-
-var _defer;
-
-if (hasSetImmediate) {
-    _defer = setImmediate;
-} else if (hasNextTick) {
-    _defer = process.nextTick;
-} else {
-    _defer = fallback;
-}
-
-var setImmediate$1 = wrap(_defer);
-
-// Simple doubly linked list (https://en.wikipedia.org/wiki/Doubly_linked_list) implementation
-// used for queues. This implementation assumes that the node provided by the user can be modified
-// to adjust the next and last properties. We implement only the minimal functionality
-// for queue support.
-function DLL() {
-    this.head = this.tail = null;
-    this.length = 0;
-}
-
-function setInitial(dll, node) {
-    dll.length = 1;
-    dll.head = dll.tail = node;
-}
-
-DLL.prototype.removeLink = function (node) {
-    if (node.prev) node.prev.next = node.next;else this.head = node.next;
-    if (node.next) node.next.prev = node.prev;else this.tail = node.prev;
-
-    node.prev = node.next = null;
-    this.length -= 1;
-    return node;
-};
-
-DLL.prototype.empty = DLL;
-
-DLL.prototype.insertAfter = function (node, newNode) {
-    newNode.prev = node;
-    newNode.next = node.next;
-    if (node.next) node.next.prev = newNode;else this.tail = newNode;
-    node.next = newNode;
-    this.length += 1;
-};
-
-DLL.prototype.insertBefore = function (node, newNode) {
-    newNode.prev = node.prev;
-    newNode.next = node;
-    if (node.prev) node.prev.next = newNode;else this.head = newNode;
-    node.prev = newNode;
-    this.length += 1;
-};
-
-DLL.prototype.unshift = function (node) {
-    if (this.head) this.insertBefore(this.head, node);else setInitial(this, node);
-};
-
-DLL.prototype.push = function (node) {
-    if (this.tail) this.insertAfter(this.tail, node);else setInitial(this, node);
-};
-
-DLL.prototype.shift = function () {
-    return this.head && this.removeLink(this.head);
-};
-
-DLL.prototype.pop = function () {
-    return this.tail && this.removeLink(this.tail);
-};
-
-function queue(worker, concurrency, payload) {
-    if (concurrency == null) {
-        concurrency = 1;
-    } else if (concurrency === 0) {
-        throw new Error('Concurrency must not be zero');
-    }
-
-    function _insert(data, insertAtFront, callback) {
-        if (callback != null && typeof callback !== 'function') {
-            throw new Error('task callback must be a function');
-        }
-        q.started = true;
-        if (!isArray(data)) {
-            data = [data];
-        }
-        if (data.length === 0 && q.idle()) {
-            // call drain immediately if there are no tasks
-            return setImmediate$1(function () {
-                q.drain();
-            });
-        }
-
-        for (var i = 0, l = data.length; i < l; i++) {
-            var item = {
-                data: data[i],
-                callback: callback || noop
-            };
-
-            if (insertAtFront) {
-                q._tasks.unshift(item);
-            } else {
-                q._tasks.push(item);
-            }
-        }
-        setImmediate$1(q.process);
-    }
-
-    function _next(tasks) {
-        return rest(function (args) {
-            workers -= 1;
-
-            for (var i = 0, l = tasks.length; i < l; i++) {
-                var task = tasks[i];
-                var index = baseIndexOf(workersList, task, 0);
-                if (index >= 0) {
-                    workersList.splice(index);
-                }
-
-                task.callback.apply(task, args);
-
-                if (args[0] != null) {
-                    q.error(args[0], task.data);
-                }
-            }
-
-            if (workers <= q.concurrency - q.buffer) {
-                q.unsaturated();
-            }
-
-            if (q.idle()) {
-                q.drain();
-            }
-            q.process();
-        });
-    }
-
-    var workers = 0;
-    var workersList = [];
-    var q = {
-        _tasks: new DLL(),
-        concurrency: concurrency,
-        payload: payload,
-        saturated: noop,
-        unsaturated: noop,
-        buffer: concurrency / 4,
-        empty: noop,
-        drain: noop,
-        error: noop,
-        started: false,
-        paused: false,
-        push: function (data, callback) {
-            _insert(data, false, callback);
-        },
-        kill: function () {
-            q.drain = noop;
-            q._tasks.empty();
-        },
-        unshift: function (data, callback) {
-            _insert(data, true, callback);
-        },
-        process: function () {
-            while (!q.paused && workers < q.concurrency && q._tasks.length) {
-                var tasks = [],
-                    data = [];
-                var l = q._tasks.length;
-                if (q.payload) l = Math.min(l, q.payload);
-                for (var i = 0; i < l; i++) {
-                    var node = q._tasks.shift();
-                    tasks.push(node);
-                    data.push(node.data);
-                }
-
-                if (q._tasks.length === 0) {
-                    q.empty();
-                }
-                workers += 1;
-                workersList.push(tasks[0]);
-
-                if (workers === q.concurrency) {
-                    q.saturated();
-                }
-
-                var cb = onlyOnce(_next(tasks));
-                worker(data, cb);
-            }
-        },
-        length: function () {
-            return q._tasks.length;
-        },
-        running: function () {
-            return workers;
-        },
-        workersList: function () {
-            return workersList;
-        },
-        idle: function () {
-            return q._tasks.length + workers === 0;
-        },
-        pause: function () {
-            q.paused = true;
-        },
-        resume: function () {
-            if (q.paused === false) {
-                return;
-            }
-            q.paused = false;
-            var resumeCount = Math.min(q.concurrency, q._tasks.length);
-            // Need to call q.process once per concurrent
-            // worker to preserve full concurrency after pause
-            for (var w = 1; w <= resumeCount; w++) {
-                setImmediate$1(q.process);
-            }
-        }
-    };
-    return q;
-}
-
-/**
- * A cargo of tasks for the worker function to complete. Cargo inherits all of
- * the same methods and event callbacks as [`queue`]{@link module:ControlFlow.queue}.
- * @typedef {Object} CargoObject
- * @memberOf module:ControlFlow
- * @property {Function} length - A function returning the number of items
- * waiting to be processed. Invoke like `cargo.length()`.
- * @property {number} payload - An `integer` for determining how many tasks
- * should be process per round. This property can be changed after a `cargo` is
- * created to alter the payload on-the-fly.
- * @property {Function} push - Adds `task` to the `queue`. The callback is
- * called once the `worker` has finished processing the task. Instead of a
- * single task, an array of `tasks` can be submitted. The respective callback is
- * used for every task in the list. Invoke like `cargo.push(task, [callback])`.
- * @property {Function} saturated - A callback that is called when the
- * `queue.length()` hits the concurrency and further tasks will be queued.
- * @property {Function} empty - A callback that is called when the last item
- * from the `queue` is given to a `worker`.
- * @property {Function} drain - A callback that is called when the last item
- * from the `queue` has returned from the `worker`.
- * @property {Function} idle - a function returning false if there are items
- * waiting or being processed, or true if not. Invoke like `cargo.idle()`.
- * @property {Function} pause - a function that pauses the processing of tasks
- * until `resume()` is called. Invoke like `cargo.pause()`.
- * @property {Function} resume - a function that resumes the processing of
- * queued tasks when the queue is paused. Invoke like `cargo.resume()`.
- * @property {Function} kill - a function that removes the `drain` callback and
- * empties remaining tasks from the queue forcing it to go idle. Invoke like `cargo.kill()`.
- */
-
-/**
- * Creates a `cargo` object with the specified payload. Tasks added to the
- * cargo will be processed altogether (up to the `payload` limit). If the
- * `worker` is in progress, the task is queued until it becomes available. Once
- * the `worker` has completed some tasks, each callback of those tasks is
- * called. Check out [these](https://camo.githubusercontent.com/6bbd36f4cf5b35a0f11a96dcd2e97711ffc2fb37/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130382f62626330636662302d356632392d313165322d393734662d3333393763363464633835382e676966) [animations](https://camo.githubusercontent.com/f4810e00e1c5f5f8addbe3e9f49064fd5d102699/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313637363837312f36383130312f38346339323036362d356632392d313165322d383134662d3964336430323431336266642e676966)
- * for how `cargo` and `queue` work.
- *
- * While [`queue`]{@link module:ControlFlow.queue} passes only one task to one of a group of workers
- * at a time, cargo passes an array of tasks to a single worker, repeating
- * when the worker is finished.
- *
- * @name cargo
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.queue]{@link module:ControlFlow.queue}
- * @category Control Flow
- * @param {Function} worker - An asynchronous function for processing an array
- * of queued tasks, which must call its `callback(err)` argument when finished,
- * with an optional `err` argument. Invoked with `(tasks, callback)`.
- * @param {number} [payload=Infinity] - An optional `integer` for determining
- * how many tasks should be processed per round; if omitted, the default is
- * unlimited.
- * @returns {module:ControlFlow.CargoObject} A cargo object to manage the tasks. Callbacks can
- * attached as certain properties to listen for specific events during the
- * lifecycle of the cargo and inner queue.
- * @example
- *
- * // create a cargo object with payload 2
- * var cargo = async.cargo(function(tasks, callback) {
- *     for (var i=0; i<tasks.length; i++) {
- *         console.log('hello ' + tasks[i].name);
- *     }
- *     callback();
- * }, 2);
- *
- * // add some items
- * cargo.push({name: 'foo'}, function(err) {
- *     console.log('finished processing foo');
- * });
- * cargo.push({name: 'bar'}, function(err) {
- *     console.log('finished processing bar');
- * });
- * cargo.push({name: 'baz'}, function(err) {
- *     console.log('finished processing baz');
- * });
- */
-function cargo(worker, payload) {
-  return queue(worker, 1, payload);
-}
-
-/**
- * The same as [`eachOf`]{@link module:Collections.eachOf} but runs only a single async operation at a time.
- *
- * @name eachOfSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.eachOf]{@link module:Collections.eachOf}
- * @alias forEachOfSeries
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each item in `coll`. The
- * `key` is the item's key, or index in the case of an array. The iteratee is
- * passed a `callback(err)` which must be called once it has completed. If no
- * error has occurred, the callback should be run without arguments or with an
- * explicit `null` argument. Invoked with (item, key, callback).
- * @param {Function} [callback] - A callback which is called when all `iteratee`
- * functions have finished, or an error occurs. Invoked with (err).
- */
-var eachOfSeries = doLimit(eachOfLimit, 1);
-
-/**
- * Reduces `coll` into a single value using an async `iteratee` to return each
- * successive step. `memo` is the initial state of the reduction. This function
- * only operates in series.
- *
- * For performance reasons, it may make sense to split a call to this function
- * into a parallel map, and then use the normal `Array.prototype.reduce` on the
- * results. This function is for situations where each step in the reduction
- * needs to be async; if you can get the data before reducing it, then it's
- * probably a good idea to do so.
- *
- * @name reduce
- * @static
- * @memberOf module:Collections
- * @method
- * @alias inject
- * @alias foldl
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {*} memo - The initial state of the reduction.
- * @param {Function} iteratee - A function applied to each item in the
- * array to produce the next step in the reduction. The `iteratee` is passed a
- * `callback(err, reduction)` which accepts an optional error as its first
- * argument, and the state of the reduction as the second. If an error is
- * passed to the callback, the reduction is stopped and the main `callback` is
- * immediately called with the error. Invoked with (memo, item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Result is the reduced value. Invoked with
- * (err, result).
- * @example
- *
- * async.reduce([1,2,3], 0, function(memo, item, callback) {
- *     // pointless async:
- *     process.nextTick(function() {
- *         callback(null, memo + item)
- *     });
- * }, function(err, result) {
- *     // result is now equal to the last value of memo, which is 6
- * });
- */
-function reduce(coll, memo, iteratee, callback) {
-    callback = once(callback || noop);
-    eachOfSeries(coll, function (x, i, callback) {
-        iteratee(memo, x, function (err, v) {
-            memo = v;
-            callback(err);
-        });
-    }, function (err) {
-        callback(err, memo);
-    });
-}
-
-/**
- * Version of the compose function that is more natural to read. Each function
- * consumes the return value of the previous function. It is the equivalent of
- * [compose]{@link module:ControlFlow.compose} with the arguments reversed.
- *
- * Each function is executed with the `this` binding of the composed function.
- *
- * @name seq
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.compose]{@link module:ControlFlow.compose}
- * @category Control Flow
- * @param {...Function} functions - the asynchronous functions to compose
- * @returns {Function} a function that composes the `functions` in order
- * @example
- *
- * // Requires lodash (or underscore), express3 and dresende's orm2.
- * // Part of an app, that fetches cats of the logged user.
- * // This example uses `seq` function to avoid overnesting and error
- * // handling clutter.
- * app.get('/cats', function(request, response) {
- *     var User = request.models.User;
- *     async.seq(
- *         _.bind(User.get, User),  // 'User.get' has signature (id, callback(err, data))
- *         function(user, fn) {
- *             user.getCats(fn);      // 'getCats' has signature (callback(err, data))
- *         }
- *     )(req.session.user_id, function (err, cats) {
- *         if (err) {
- *             console.error(err);
- *             response.json({ status: 'error', message: err.message });
- *         } else {
- *             response.json({ status: 'ok', message: 'Cats found', data: cats });
- *         }
- *     });
- * });
- */
-var seq$1 = rest(function seq(functions) {
-    return rest(function (args) {
-        var that = this;
-
-        var cb = args[args.length - 1];
-        if (typeof cb == 'function') {
-            args.pop();
-        } else {
-            cb = noop;
-        }
-
-        reduce(functions, args, function (newargs, fn, cb) {
-            fn.apply(that, newargs.concat(rest(function (err, nextargs) {
-                cb(err, nextargs);
-            })));
-        }, function (err, results) {
-            cb.apply(that, [err].concat(results));
-        });
-    });
-});
-
-/**
- * Creates a function which is a composition of the passed asynchronous
- * functions. Each function consumes the return value of the function that
- * follows. Composing functions `f()`, `g()`, and `h()` would produce the result
- * of `f(g(h()))`, only this version uses callbacks to obtain the return values.
- *
- * Each function is executed with the `this` binding of the composed function.
- *
- * @name compose
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {...Function} functions - the asynchronous functions to compose
- * @returns {Function} an asynchronous function that is the composed
- * asynchronous `functions`
- * @example
- *
- * function add1(n, callback) {
- *     setTimeout(function () {
- *         callback(null, n + 1);
- *     }, 10);
- * }
- *
- * function mul3(n, callback) {
- *     setTimeout(function () {
- *         callback(null, n * 3);
- *     }, 10);
- * }
- *
- * var add1mul3 = async.compose(mul3, add1);
- * add1mul3(4, function (err, result) {
- *     // result now equals 15
- * });
- */
-var compose = rest(function (args) {
-  return seq$1.apply(null, args.reverse());
-});
-
-function concat$1(eachfn, arr, fn, callback) {
-    var result = [];
-    eachfn(arr, function (x, index, cb) {
-        fn(x, function (err, y) {
-            result = result.concat(y || []);
-            cb(err);
-        });
-    }, function (err) {
-        callback(err, result);
-    });
-}
-
-/**
- * Applies `iteratee` to each item in `coll`, concatenating the results. Returns
- * the concatenated list. The `iteratee`s are called in parallel, and the
- * results are concatenated as they return. There is no guarantee that the
- * results array will be returned in the original order of `coll` passed to the
- * `iteratee` function.
- *
- * @name concat
- * @static
- * @memberOf module:Collections
- * @method
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, results)` which must be called once
- * it has completed with an error (which can be `null`) and an array of results.
- * Invoked with (item, callback).
- * @param {Function} [callback(err)] - A callback which is called after all the
- * `iteratee` functions have finished, or an error occurs. Results is an array
- * containing the concatenated results of the `iteratee` function. Invoked with
- * (err, results).
- * @example
- *
- * async.concat(['dir1','dir2','dir3'], fs.readdir, function(err, files) {
- *     // files is now a list of filenames that exist in the 3 directories
- * });
- */
-var concat = doParallel(concat$1);
-
-function doSeries(fn) {
-    return function (obj, iteratee, callback) {
-        return fn(eachOfSeries, obj, iteratee, callback);
-    };
-}
-
-/**
- * The same as [`concat`]{@link module:Collections.concat} but runs only a single async operation at a time.
- *
- * @name concatSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.concat]{@link module:Collections.concat}
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, results)` which must be called once
- * it has completed with an error (which can be `null`) and an array of results.
- * Invoked with (item, callback).
- * @param {Function} [callback(err)] - A callback which is called after all the
- * `iteratee` functions have finished, or an error occurs. Results is an array
- * containing the concatenated results of the `iteratee` function. Invoked with
- * (err, results).
- */
-var concatSeries = doSeries(concat$1);
-
-/**
- * Returns a function that when called, calls-back with the values provided.
- * Useful as the first function in a [`waterfall`]{@link module:ControlFlow.waterfall}, or for plugging values in to
- * [`auto`]{@link module:ControlFlow.auto}.
- *
- * @name constant
- * @static
- * @memberOf module:Utils
- * @method
- * @category Util
- * @param {...*} arguments... - Any number of arguments to automatically invoke
- * callback with.
- * @returns {Function} Returns a function that when invoked, automatically
- * invokes the callback with the previous given arguments.
- * @example
- *
- * async.waterfall([
- *     async.constant(42),
- *     function (value, next) {
- *         // value === 42
- *     },
- *     //...
- * ], callback);
- *
- * async.waterfall([
- *     async.constant(filename, "utf8"),
- *     fs.readFile,
- *     function (fileData, next) {
- *         //...
- *     }
- *     //...
- * ], callback);
- *
- * async.auto({
- *     hostname: async.constant("https://server.net/"),
- *     port: findFreePort,
- *     launchServer: ["hostname", "port", function (options, cb) {
- *         startServer(options, cb);
- *     }],
- *     //...
- * }, callback);
- */
-var constant = rest(function (values) {
-    var args = [null].concat(values);
-    return initialParams(function (ignoredArgs, callback) {
-        return callback.apply(this, args);
-    });
-});
-
-function _createTester(eachfn, check, getResult) {
-    return function (arr, limit, iteratee, cb) {
-        function done() {
-            if (cb) {
-                cb(null, getResult(false));
-            }
-        }
-        function wrappedIteratee(x, _, callback) {
-            if (!cb) return callback();
-            iteratee(x, function (err, v) {
-                // Check cb as another iteratee may have resolved with a
-                // value or error since we started this iteratee
-                if (cb && (err || check(v))) {
-                    if (err) cb(err);else cb(err, getResult(true, x));
-                    cb = iteratee = false;
-                    callback(err, breakLoop);
-                } else {
-                    callback();
-                }
-            });
-        }
-        if (arguments.length > 3) {
-            cb = cb || noop;
-            eachfn(arr, limit, wrappedIteratee, done);
-        } else {
-            cb = iteratee;
-            cb = cb || noop;
-            iteratee = limit;
-            eachfn(arr, wrappedIteratee, done);
-        }
-    };
-}
-
-function _findGetResult(v, x) {
-    return x;
-}
-
-/**
- * Returns the first value in `coll` that passes an async truth test. The
- * `iteratee` is applied in parallel, meaning the first iteratee to return
- * `true` will fire the detect `callback` with that result. That means the
- * result might not be the first item in the original `coll` (in terms of order)
- * that passes the test.
-
- * If order within the original `coll` is important, then look at
- * [`detectSeries`]{@link module:Collections.detectSeries}.
- *
- * @name detect
- * @static
- * @memberOf module:Collections
- * @method
- * @alias find
- * @category Collections
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, truthValue)` which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called as soon as any
- * iteratee returns `true`, or after all the `iteratee` functions have finished.
- * Result will be the first item in the array that passes the truth test
- * (iteratee) or the value `undefined` if none passed. Invoked with
- * (err, result).
- * @example
- *
- * async.detect(['file1','file2','file3'], function(filePath, callback) {
- *     fs.access(filePath, function(err) {
- *         callback(null, !err)
- *     });
- * }, function(err, result) {
- *     // result now equals the first file in the list that exists
- * });
- */
-var detect = _createTester(eachOf, identity, _findGetResult);
-
-/**
- * The same as [`detect`]{@link module:Collections.detect} but runs a maximum of `limit` async operations at a
- * time.
- *
- * @name detectLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.detect]{@link module:Collections.detect}
- * @alias findLimit
- * @category Collections
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, truthValue)` which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called as soon as any
- * iteratee returns `true`, or after all the `iteratee` functions have finished.
- * Result will be the first item in the array that passes the truth test
- * (iteratee) or the value `undefined` if none passed. Invoked with
- * (err, result).
- */
-var detectLimit = _createTester(eachOfLimit, identity, _findGetResult);
-
-/**
- * The same as [`detect`]{@link module:Collections.detect} but runs only a single async operation at a time.
- *
- * @name detectSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.detect]{@link module:Collections.detect}
- * @alias findSeries
- * @category Collections
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, truthValue)` which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called as soon as any
- * iteratee returns `true`, or after all the `iteratee` functions have finished.
- * Result will be the first item in the array that passes the truth test
- * (iteratee) or the value `undefined` if none passed. Invoked with
- * (err, result).
- */
-var detectSeries = _createTester(eachOfSeries, identity, _findGetResult);
-
-function consoleFunc(name) {
-    return rest(function (fn, args) {
-        fn.apply(null, args.concat(rest(function (err, args) {
-            if (typeof console === 'object') {
-                if (err) {
-                    if (console.error) {
-                        console.error(err);
-                    }
-                } else if (console[name]) {
-                    arrayEach(args, function (x) {
-                        console[name](x);
-                    });
-                }
-            }
-        })));
-    });
-}
-
-/**
- * Logs the result of an `async` function to the `console` using `console.dir`
- * to display the properties of the resulting object. Only works in Node.js or
- * in browsers that support `console.dir` and `console.error` (such as FF and
- * Chrome). If multiple arguments are returned from the async function,
- * `console.dir` is called on each argument in order.
- *
- * @name dir
- * @static
- * @memberOf module:Utils
- * @method
- * @category Util
- * @param {Function} function - The function you want to eventually apply all
- * arguments to.
- * @param {...*} arguments... - Any number of arguments to apply to the function.
- * @example
- *
- * // in a module
- * var hello = function(name, callback) {
- *     setTimeout(function() {
- *         callback(null, {hello: name});
- *     }, 1000);
- * };
- *
- * // in the node repl
- * node> async.dir(hello, 'world');
- * {hello: 'world'}
- */
-var dir = consoleFunc('dir');
-
-/**
- * The post-check version of [`during`]{@link module:ControlFlow.during}. To reflect the difference in
- * the order of operations, the arguments `test` and `fn` are switched.
- *
- * Also a version of [`doWhilst`]{@link module:ControlFlow.doWhilst} with asynchronous `test` function.
- * @name doDuring
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.during]{@link module:ControlFlow.during}
- * @category Control Flow
- * @param {Function} fn - A function which is called each time `test` passes.
- * The function is passed a `callback(err)`, which must be called once it has
- * completed with an optional `err` argument. Invoked with (callback).
- * @param {Function} test - asynchronous truth test to perform before each
- * execution of `fn`. Invoked with (...args, callback), where `...args` are the
- * non-error args from the previous callback of `fn`.
- * @param {Function} [callback] - A callback which is called after the test
- * function has failed and repeated execution of `fn` has stopped. `callback`
- * will be passed an error if one occured, otherwise `null`.
- */
-function doDuring(fn, test, callback) {
-    callback = onlyOnce(callback || noop);
-
-    var next = rest(function (err, args) {
-        if (err) return callback(err);
-        args.push(check);
-        test.apply(this, args);
-    });
-
-    function check(err, truth) {
-        if (err) return callback(err);
-        if (!truth) return callback(null);
-        fn(next);
-    }
-
-    check(null, true);
-}
-
-/**
- * The post-check version of [`whilst`]{@link module:ControlFlow.whilst}. To reflect the difference in
- * the order of operations, the arguments `test` and `iteratee` are switched.
- *
- * `doWhilst` is to `whilst` as `do while` is to `while` in plain JavaScript.
- *
- * @name doWhilst
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.whilst]{@link module:ControlFlow.whilst}
- * @category Control Flow
- * @param {Function} iteratee - A function which is called each time `test`
- * passes. The function is passed a `callback(err)`, which must be called once
- * it has completed with an optional `err` argument. Invoked with (callback).
- * @param {Function} test - synchronous truth test to perform after each
- * execution of `iteratee`. Invoked with the non-error callback results of
- * `iteratee`.
- * @param {Function} [callback] - A callback which is called after the test
- * function has failed and repeated execution of `iteratee` has stopped.
- * `callback` will be passed an error and any arguments passed to the final
- * `iteratee`'s callback. Invoked with (err, [results]);
- */
-function doWhilst(iteratee, test, callback) {
-    callback = onlyOnce(callback || noop);
-    var next = rest(function (err, args) {
-        if (err) return callback(err);
-        if (test.apply(this, args)) return iteratee(next);
-        callback.apply(null, [null].concat(args));
-    });
-    iteratee(next);
-}
-
-/**
- * Like ['doWhilst']{@link module:ControlFlow.doWhilst}, except the `test` is inverted. Note the
- * argument ordering differs from `until`.
- *
- * @name doUntil
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.doWhilst]{@link module:ControlFlow.doWhilst}
- * @category Control Flow
- * @param {Function} fn - A function which is called each time `test` fails.
- * The function is passed a `callback(err)`, which must be called once it has
- * completed with an optional `err` argument. Invoked with (callback).
- * @param {Function} test - synchronous truth test to perform after each
- * execution of `fn`. Invoked with the non-error callback results of `fn`.
- * @param {Function} [callback] - A callback which is called after the test
- * function has passed and repeated execution of `fn` has stopped. `callback`
- * will be passed an error and any arguments passed to the final `fn`'s
- * callback. Invoked with (err, [results]);
- */
-function doUntil(fn, test, callback) {
-    doWhilst(fn, function () {
-        return !test.apply(this, arguments);
-    }, callback);
-}
-
-/**
- * Like [`whilst`]{@link module:ControlFlow.whilst}, except the `test` is an asynchronous function that
- * is passed a callback in the form of `function (err, truth)`. If error is
- * passed to `test` or `fn`, the main callback is immediately called with the
- * value of the error.
- *
- * @name during
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.whilst]{@link module:ControlFlow.whilst}
- * @category Control Flow
- * @param {Function} test - asynchronous truth test to perform before each
- * execution of `fn`. Invoked with (callback).
- * @param {Function} fn - A function which is called each time `test` passes.
- * The function is passed a `callback(err)`, which must be called once it has
- * completed with an optional `err` argument. Invoked with (callback).
- * @param {Function} [callback] - A callback which is called after the test
- * function has failed and repeated execution of `fn` has stopped. `callback`
- * will be passed an error, if one occured, otherwise `null`.
- * @example
- *
- * var count = 0;
- *
- * async.during(
- *     function (callback) {
- *         return callback(null, count < 5);
- *     },
- *     function (callback) {
- *         count++;
- *         setTimeout(callback, 1000);
- *     },
- *     function (err) {
- *         // 5 seconds have passed
- *     }
- * );
- */
-function during(test, fn, callback) {
-    callback = onlyOnce(callback || noop);
-
-    function next(err) {
-        if (err) return callback(err);
-        test(check);
-    }
-
-    function check(err, truth) {
-        if (err) return callback(err);
-        if (!truth) return callback(null);
-        fn(next);
-    }
-
-    test(check);
-}
-
-function _withoutIndex(iteratee) {
-    return function (value, index, callback) {
-        return iteratee(value, callback);
-    };
-}
-
-/**
- * Applies the function `iteratee` to each item in `coll`, in parallel.
- * The `iteratee` is called with an item from the list, and a callback for when
- * it has finished. If the `iteratee` passes an error to its `callback`, the
- * main `callback` (for the `each` function) is immediately called with the
- * error.
- *
- * Note, that since this function applies `iteratee` to each item in parallel,
- * there is no guarantee that the iteratee functions will complete in order.
- *
- * @name each
- * @static
- * @memberOf module:Collections
- * @method
- * @alias forEach
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each item
- * in `coll`. The iteratee is passed a `callback(err)` which must be called once
- * it has completed. If no error has occurred, the `callback` should be run
- * without arguments or with an explicit `null` argument. The array index is not
- * passed to the iteratee. Invoked with (item, callback). If you need the index,
- * use `eachOf`.
- * @param {Function} [callback] - A callback which is called when all
- * `iteratee` functions have finished, or an error occurs. Invoked with (err).
- * @example
- *
- * // assuming openFiles is an array of file names and saveFile is a function
- * // to save the modified contents of that file:
- *
- * async.each(openFiles, saveFile, function(err){
- *   // if any of the saves produced an error, err would equal that error
- * });
- *
- * // assuming openFiles is an array of file names
- * async.each(openFiles, function(file, callback) {
- *
- *     // Perform operation on file here.
- *     console.log('Processing file ' + file);
- *
- *     if( file.length > 32 ) {
- *       console.log('This file name is too long');
- *       callback('File name too long');
- *     } else {
- *       // Do work to process file here
- *       console.log('File processed');
- *       callback();
- *     }
- * }, function(err) {
- *     // if any of the file processing produced an error, err would equal that error
- *     if( err ) {
- *       // One of the iterations produced an error.
- *       // All processing will now stop.
- *       console.log('A file failed to process');
- *     } else {
- *       console.log('All files have been processed successfully');
- *     }
- * });
- */
-function eachLimit(coll, iteratee, callback) {
-  eachOf(coll, _withoutIndex(iteratee), callback);
-}
-
-/**
- * The same as [`each`]{@link module:Collections.each} but runs a maximum of `limit` async operations at a time.
- *
- * @name eachLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.each]{@link module:Collections.each}
- * @alias forEachLimit
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A function to apply to each item in `coll`. The
- * iteratee is passed a `callback(err)` which must be called once it has
- * completed. If no error has occurred, the `callback` should be run without
- * arguments or with an explicit `null` argument. The array index is not passed
- * to the iteratee. Invoked with (item, callback). If you need the index, use
- * `eachOfLimit`.
- * @param {Function} [callback] - A callback which is called when all
- * `iteratee` functions have finished, or an error occurs. Invoked with (err).
- */
-function eachLimit$1(coll, limit, iteratee, callback) {
-  _eachOfLimit(limit)(coll, _withoutIndex(iteratee), callback);
-}
-
-/**
- * The same as [`each`]{@link module:Collections.each} but runs only a single async operation at a time.
- *
- * @name eachSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.each]{@link module:Collections.each}
- * @alias forEachSeries
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each
- * item in `coll`. The iteratee is passed a `callback(err)` which must be called
- * once it has completed. If no error has occurred, the `callback` should be run
- * without arguments or with an explicit `null` argument. The array index is
- * not passed to the iteratee. Invoked with (item, callback). If you need the
- * index, use `eachOfSeries`.
- * @param {Function} [callback] - A callback which is called when all
- * `iteratee` functions have finished, or an error occurs. Invoked with (err).
- */
-var eachSeries = doLimit(eachLimit$1, 1);
-
-/**
- * Wrap an async function and ensure it calls its callback on a later tick of
- * the event loop.  If the function already calls its callback on a next tick,
- * no extra deferral is added. This is useful for preventing stack overflows
- * (`RangeError: Maximum call stack size exceeded`) and generally keeping
- * [Zalgo](http://blog.izs.me/post/59142742143/designing-apis-for-asynchrony)
- * contained.
- *
- * @name ensureAsync
- * @static
- * @memberOf module:Utils
- * @method
- * @category Util
- * @param {Function} fn - an async function, one that expects a node-style
- * callback as its last argument.
- * @returns {Function} Returns a wrapped function with the exact same call
- * signature as the function passed in.
- * @example
- *
- * function sometimesAsync(arg, callback) {
- *     if (cache[arg]) {
- *         return callback(null, cache[arg]); // this would be synchronous!!
- *     } else {
- *         doSomeIO(arg, callback); // this IO would be asynchronous
- *     }
- * }
- *
- * // this has a risk of stack overflows if many results are cached in a row
- * async.mapSeries(args, sometimesAsync, done);
- *
- * // this will defer sometimesAsync's callback if necessary,
- * // preventing stack overflows
- * async.mapSeries(args, async.ensureAsync(sometimesAsync), done);
- */
-function ensureAsync(fn) {
-    return initialParams(function (args, callback) {
-        var sync = true;
-        args.push(function () {
-            var innerArgs = arguments;
-            if (sync) {
-                setImmediate$1(function () {
-                    callback.apply(null, innerArgs);
-                });
-            } else {
-                callback.apply(null, innerArgs);
-            }
-        });
-        fn.apply(this, args);
-        sync = false;
-    });
-}
-
-function notId(v) {
-    return !v;
-}
-
-/**
- * Returns `true` if every element in `coll` satisfies an async test. If any
- * iteratee call returns `false`, the main `callback` is immediately called.
- *
- * @name every
- * @static
- * @memberOf module:Collections
- * @method
- * @alias all
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in the
- * collection in parallel. The iteratee is passed a `callback(err, truthValue)`
- * which must be called with a  boolean argument once it has completed. Invoked
- * with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Result will be either `true` or `false`
- * depending on the values of the async tests. Invoked with (err, result).
- * @example
- *
- * async.every(['file1','file2','file3'], function(filePath, callback) {
- *     fs.access(filePath, function(err) {
- *         callback(null, !err)
- *     });
- * }, function(err, result) {
- *     // if result is true then every file exists
- * });
- */
-var every = _createTester(eachOf, notId, notId);
-
-/**
- * The same as [`every`]{@link module:Collections.every} but runs a maximum of `limit` async operations at a time.
- *
- * @name everyLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.every]{@link module:Collections.every}
- * @alias allLimit
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A truth test to apply to each item in the
- * collection in parallel. The iteratee is passed a `callback(err, truthValue)`
- * which must be called with a  boolean argument once it has completed. Invoked
- * with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Result will be either `true` or `false`
- * depending on the values of the async tests. Invoked with (err, result).
- */
-var everyLimit = _createTester(eachOfLimit, notId, notId);
-
-/**
- * The same as [`every`]{@link module:Collections.every} but runs only a single async operation at a time.
- *
- * @name everySeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.every]{@link module:Collections.every}
- * @alias allSeries
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in the
- * collection in parallel. The iteratee is passed a `callback(err, truthValue)`
- * which must be called with a  boolean argument once it has completed. Invoked
- * with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Result will be either `true` or `false`
- * depending on the values of the async tests. Invoked with (err, result).
- */
-var everySeries = doLimit(everyLimit, 1);
-
-/**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
-function baseProperty(key) {
-  return function(object) {
-    return object == null ? undefined : object[key];
-  };
-}
-
-function filterArray(eachfn, arr, iteratee, callback) {
-    var truthValues = new Array(arr.length);
-    eachfn(arr, function (x, index, callback) {
-        iteratee(x, function (err, v) {
-            truthValues[index] = !!v;
-            callback(err);
-        });
-    }, function (err) {
-        if (err) return callback(err);
-        var results = [];
-        for (var i = 0; i < arr.length; i++) {
-            if (truthValues[i]) results.push(arr[i]);
-        }
-        callback(null, results);
-    });
-}
-
-function filterGeneric(eachfn, coll, iteratee, callback) {
-    var results = [];
-    eachfn(coll, function (x, index, callback) {
-        iteratee(x, function (err, v) {
-            if (err) {
-                callback(err);
-            } else {
-                if (v) {
-                    results.push({ index: index, value: x });
-                }
-                callback();
-            }
-        });
-    }, function (err) {
-        if (err) {
-            callback(err);
-        } else {
-            callback(null, arrayMap(results.sort(function (a, b) {
-                return a.index - b.index;
-            }), baseProperty('value')));
-        }
-    });
-}
-
-function _filter(eachfn, coll, iteratee, callback) {
-    var filter = isArrayLike(coll) ? filterArray : filterGeneric;
-    filter(eachfn, coll, iteratee, callback || noop);
-}
-
-/**
- * Returns a new array of all the values in `coll` which pass an async truth
- * test. This operation is performed in parallel, but the results array will be
- * in the same order as the original.
- *
- * @name filter
- * @static
- * @memberOf module:Collections
- * @method
- * @alias select
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Invoked with (err, results).
- * @example
- *
- * async.filter(['file1','file2','file3'], function(filePath, callback) {
- *     fs.access(filePath, function(err) {
- *         callback(null, !err)
- *     });
- * }, function(err, results) {
- *     // results now equals an array of the existing files
- * });
- */
-var filter = doParallel(_filter);
-
-/**
- * The same as [`filter`]{@link module:Collections.filter} but runs a maximum of `limit` async operations at a
- * time.
- *
- * @name filterLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.filter]{@link module:Collections.filter}
- * @alias selectLimit
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Invoked with (err, results).
- */
-var filterLimit = doParallelLimit(_filter);
-
-/**
- * The same as [`filter`]{@link module:Collections.filter} but runs only a single async operation at a time.
- *
- * @name filterSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.filter]{@link module:Collections.filter}
- * @alias selectSeries
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Invoked with (err, results)
- */
-var filterSeries = doLimit(filterLimit, 1);
-
-/**
- * Calls the asynchronous function `fn` with a callback parameter that allows it
- * to call itself again, in series, indefinitely.
-
- * If an error is passed to the
- * callback then `errback` is called with the error, and execution stops,
- * otherwise it will never be called.
- *
- * @name forever
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Function} fn - a function to call repeatedly. Invoked with (next).
- * @param {Function} [errback] - when `fn` passes an error to it's callback,
- * this function will be called, and execution stops. Invoked with (err).
- * @example
- *
- * async.forever(
- *     function(next) {
- *         // next is suitable for passing to things that need a callback(err [, whatever]);
- *         // it will result in this function being called again.
- *     },
- *     function(err) {
- *         // if next is called with a value in its first parameter, it will appear
- *         // in here as 'err', and execution will stop.
- *     }
- * );
- */
-function forever(fn, errback) {
-    var done = onlyOnce(errback || noop);
-    var task = ensureAsync(fn);
-
-    function next(err) {
-        if (err) return done(err);
-        task(next);
-    }
-    next();
-}
-
-/**
- * Logs the result of an `async` function to the `console`. Only works in
- * Node.js or in browsers that support `console.log` and `console.error` (such
- * as FF and Chrome). If multiple arguments are returned from the async
- * function, `console.log` is called on each argument in order.
- *
- * @name log
- * @static
- * @memberOf module:Utils
- * @method
- * @category Util
- * @param {Function} function - The function you want to eventually apply all
- * arguments to.
- * @param {...*} arguments... - Any number of arguments to apply to the function.
- * @example
- *
- * // in a module
- * var hello = function(name, callback) {
- *     setTimeout(function() {
- *         callback(null, 'hello ' + name);
- *     }, 1000);
- * };
- *
- * // in the node repl
- * node> async.log(hello, 'world');
- * 'hello world'
- */
-var log = consoleFunc('log');
-
-/**
- * The same as [`mapValues`]{@link module:Collections.mapValues} but runs a maximum of `limit` async operations at a
- * time.
- *
- * @name mapValuesLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.mapValues]{@link module:Collections.mapValues}
- * @category Collection
- * @param {Object} obj - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A function to apply to each value in `obj`.
- * The iteratee is passed a `callback(err, transformed)` which must be called
- * once it has completed with an error (which can be `null`) and a
- * transformed value. Invoked with (value, key, callback).
- * @param {Function} [callback] - A callback which is called when all `iteratee`
- * functions have finished, or an error occurs. `result` is a new object consisting
- * of each key from `obj`, with each transformed value on the right-hand side.
- * Invoked with (err, result).
- */
-function mapValuesLimit(obj, limit, iteratee, callback) {
-    callback = once(callback || noop);
-    var newObj = {};
-    eachOfLimit(obj, limit, function (val, key, next) {
-        iteratee(val, key, function (err, result) {
-            if (err) return next(err);
-            newObj[key] = result;
-            next();
-        });
-    }, function (err) {
-        callback(err, newObj);
-    });
-}
-
-/**
- * A relative of [`map`]{@link module:Collections.map}, designed for use with objects.
- *
- * Produces a new Object by mapping each value of `obj` through the `iteratee`
- * function. The `iteratee` is called each `value` and `key` from `obj` and a
- * callback for when it has finished processing. Each of these callbacks takes
- * two arguments: an `error`, and the transformed item from `obj`. If `iteratee`
- * passes an error to its callback, the main `callback` (for the `mapValues`
- * function) is immediately called with the error.
- *
- * Note, the order of the keys in the result is not guaranteed.  The keys will
- * be roughly in the order they complete, (but this is very engine-specific)
- *
- * @name mapValues
- * @static
- * @memberOf module:Collections
- * @method
- * @category Collection
- * @param {Object} obj - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each value and key in
- * `coll`. The iteratee is passed a `callback(err, transformed)` which must be
- * called once it has completed with an error (which can be `null`) and a
- * transformed value. Invoked with (value, key, callback).
- * @param {Function} [callback] - A callback which is called when all `iteratee`
- * functions have finished, or an error occurs. `result` is a new object consisting
- * of each key from `obj`, with each transformed value on the right-hand side.
- * Invoked with (err, result).
- * @example
- *
- * async.mapValues({
- *     f1: 'file1',
- *     f2: 'file2',
- *     f3: 'file3'
- * }, function (file, key, callback) {
- *   fs.stat(file, callback);
- * }, function(err, result) {
- *     // result is now a map of stats for each file, e.g.
- *     // {
- *     //     f1: [stats for file1],
- *     //     f2: [stats for file2],
- *     //     f3: [stats for file3]
- *     // }
- * });
- */
-
-var mapValues = doLimit(mapValuesLimit, Infinity);
-
-/**
- * The same as [`mapValues`]{@link module:Collections.mapValues} but runs only a single async operation at a time.
- *
- * @name mapValuesSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.mapValues]{@link module:Collections.mapValues}
- * @category Collection
- * @param {Object} obj - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each value in `obj`.
- * The iteratee is passed a `callback(err, transformed)` which must be called
- * once it has completed with an error (which can be `null`) and a
- * transformed value. Invoked with (value, key, callback).
- * @param {Function} [callback] - A callback which is called when all `iteratee`
- * functions have finished, or an error occurs. `result` is a new object consisting
- * of each key from `obj`, with each transformed value on the right-hand side.
- * Invoked with (err, result).
- */
-var mapValuesSeries = doLimit(mapValuesLimit, 1);
-
-function has(obj, key) {
-    return key in obj;
-}
-
-/**
- * Caches the results of an `async` function. When creating a hash to store
- * function results against, the callback is omitted from the hash and an
- * optional hash function can be used.
- *
- * If no hash function is specified, the first argument is used as a hash key,
- * which may work reasonably if it is a string or a data type that converts to a
- * distinct string. Note that objects and arrays will not behave reasonably.
- * Neither will cases where the other arguments are significant. In such cases,
- * specify your own hash function.
- *
- * The cache of results is exposed as the `memo` property of the function
- * returned by `memoize`.
- *
- * @name memoize
- * @static
- * @memberOf module:Utils
- * @method
- * @category Util
- * @param {Function} fn - The function to proxy and cache results from.
- * @param {Function} hasher - An optional function for generating a custom hash
- * for storing results. It has all the arguments applied to it apart from the
- * callback, and must be synchronous.
- * @returns {Function} a memoized version of `fn`
- * @example
- *
- * var slow_fn = function(name, callback) {
- *     // do something
- *     callback(null, result);
- * };
- * var fn = async.memoize(slow_fn);
- *
- * // fn can now be used as if it were slow_fn
- * fn('some name', function() {
- *     // callback
- * });
- */
-function memoize(fn, hasher) {
-    var memo = Object.create(null);
-    var queues = Object.create(null);
-    hasher = hasher || identity;
-    var memoized = initialParams(function memoized(args, callback) {
-        var key = hasher.apply(null, args);
-        if (has(memo, key)) {
-            setImmediate$1(function () {
-                callback.apply(null, memo[key]);
-            });
-        } else if (has(queues, key)) {
-            queues[key].push(callback);
-        } else {
-            queues[key] = [callback];
-            fn.apply(null, args.concat(rest(function (args) {
-                memo[key] = args;
-                var q = queues[key];
-                delete queues[key];
-                for (var i = 0, l = q.length; i < l; i++) {
-                    q[i].apply(null, args);
-                }
-            })));
-        }
-    });
-    memoized.memo = memo;
-    memoized.unmemoized = fn;
-    return memoized;
-}
-
-/**
- * Calls `callback` on a later loop around the event loop. In Node.js this just
- * calls `setImmediate`.  In the browser it will use `setImmediate` if
- * available, otherwise `setTimeout(callback, 0)`, which means other higher
- * priority events may precede the execution of `callback`.
- *
- * This is used internally for browser-compatibility purposes.
- *
- * @name nextTick
- * @static
- * @memberOf module:Utils
- * @method
- * @alias setImmediate
- * @category Util
- * @param {Function} callback - The function to call on a later loop around
- * the event loop. Invoked with (args...).
- * @param {...*} args... - any number of additional arguments to pass to the
- * callback on the next tick.
- * @example
- *
- * var call_order = [];
- * async.nextTick(function() {
- *     call_order.push('two');
- *     // call_order now equals ['one','two']
- * });
- * call_order.push('one');
- *
- * async.setImmediate(function (a, b, c) {
- *     // a, b, and c equal 1, 2, and 3
- * }, 1, 2, 3);
- */
-var _defer$1;
-
-if (hasNextTick) {
-    _defer$1 = process.nextTick;
-} else if (hasSetImmediate) {
-    _defer$1 = setImmediate;
-} else {
-    _defer$1 = fallback;
-}
-
-var nextTick = wrap(_defer$1);
-
-function _parallel(eachfn, tasks, callback) {
-    callback = callback || noop;
-    var results = isArrayLike(tasks) ? [] : {};
-
-    eachfn(tasks, function (task, key, callback) {
-        task(rest(function (err, args) {
-            if (args.length <= 1) {
-                args = args[0];
-            }
-            results[key] = args;
-            callback(err);
-        }));
-    }, function (err) {
-        callback(err, results);
-    });
-}
-
-/**
- * Run the `tasks` collection of functions in parallel, without waiting until
- * the previous function has completed. If any of the functions pass an error to
- * its callback, the main `callback` is immediately called with the value of the
- * error. Once the `tasks` have completed, the results are passed to the final
- * `callback` as an array.
- *
- * **Note:** `parallel` is about kicking-off I/O tasks in parallel, not about
- * parallel execution of code.  If your tasks do not use any timers or perform
- * any I/O, they will actually be executed in series.  Any synchronous setup
- * sections for each task will happen one after the other.  JavaScript remains
- * single-threaded.
- *
- * It is also possible to use an object instead of an array. Each property will
- * be run as a function and the results will be passed to the final `callback`
- * as an object instead of an array. This can be a more readable way of handling
- * results from {@link async.parallel}.
- *
- * @name parallel
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Array|Iterable|Object} tasks - A collection containing functions to run.
- * Each function is passed a `callback(err, result)` which it must call on
- * completion with an error `err` (which can be `null`) and an optional `result`
- * value.
- * @param {Function} [callback] - An optional callback to run once all the
- * functions have completed successfully. This function gets a results array
- * (or object) containing all the result arguments passed to the task callbacks.
- * Invoked with (err, results).
- * @example
- * async.parallel([
- *     function(callback) {
- *         setTimeout(function() {
- *             callback(null, 'one');
- *         }, 200);
- *     },
- *     function(callback) {
- *         setTimeout(function() {
- *             callback(null, 'two');
- *         }, 100);
- *     }
- * ],
- * // optional callback
- * function(err, results) {
- *     // the results array will equal ['one','two'] even though
- *     // the second function had a shorter timeout.
- * });
- *
- * // an example using an object instead of an array
- * async.parallel({
- *     one: function(callback) {
- *         setTimeout(function() {
- *             callback(null, 1);
- *         }, 200);
- *     },
- *     two: function(callback) {
- *         setTimeout(function() {
- *             callback(null, 2);
- *         }, 100);
- *     }
- * }, function(err, results) {
- *     // results is now equals to: {one: 1, two: 2}
- * });
- */
-function parallelLimit(tasks, callback) {
-  _parallel(eachOf, tasks, callback);
-}
-
-/**
- * The same as [`parallel`]{@link module:ControlFlow.parallel} but runs a maximum of `limit` async operations at a
- * time.
- *
- * @name parallelLimit
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.parallel]{@link module:ControlFlow.parallel}
- * @category Control Flow
- * @param {Array|Collection} tasks - A collection containing functions to run.
- * Each function is passed a `callback(err, result)` which it must call on
- * completion with an error `err` (which can be `null`) and an optional `result`
- * value.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} [callback] - An optional callback to run once all the
- * functions have completed successfully. This function gets a results array
- * (or object) containing all the result arguments passed to the task callbacks.
- * Invoked with (err, results).
- */
-function parallelLimit$1(tasks, limit, callback) {
-  _parallel(_eachOfLimit(limit), tasks, callback);
-}
-
-/**
- * A queue of tasks for the worker function to complete.
- * @typedef {Object} QueueObject
- * @memberOf module:ControlFlow
- * @property {Function} length - a function returning the number of items
- * waiting to be processed. Invoke with `queue.length()`.
- * @property {boolean} started - a boolean indicating whether or not any
- * items have been pushed and processed by the queue.
- * @property {Function} running - a function returning the number of items
- * currently being processed. Invoke with `queue.running()`.
- * @property {Function} workersList - a function returning the array of items
- * currently being processed. Invoke with `queue.workersList()`.
- * @property {Function} idle - a function returning false if there are items
- * waiting or being processed, or true if not. Invoke with `queue.idle()`.
- * @property {number} concurrency - an integer for determining how many `worker`
- * functions should be run in parallel. This property can be changed after a
- * `queue` is created to alter the concurrency on-the-fly.
- * @property {Function} push - add a new task to the `queue`. Calls `callback`
- * once the `worker` has finished processing the task. Instead of a single task,
- * a `tasks` array can be submitted. The respective callback is used for every
- * task in the list. Invoke with `queue.push(task, [callback])`,
- * @property {Function} unshift - add a new task to the front of the `queue`.
- * Invoke with `queue.unshift(task, [callback])`.
- * @property {Function} saturated - a callback that is called when the number of
- * running workers hits the `concurrency` limit, and further tasks will be
- * queued.
- * @property {Function} unsaturated - a callback that is called when the number
- * of running workers is less than the `concurrency` & `buffer` limits, and
- * further tasks will not be queued.
- * @property {number} buffer - A minimum threshold buffer in order to say that
- * the `queue` is `unsaturated`.
- * @property {Function} empty - a callback that is called when the last item
- * from the `queue` is given to a `worker`.
- * @property {Function} drain - a callback that is called when the last item
- * from the `queue` has returned from the `worker`.
- * @property {Function} error - a callback that is called when a task errors.
- * Has the signature `function(error, task)`.
- * @property {boolean} paused - a boolean for determining whether the queue is
- * in a paused state.
- * @property {Function} pause - a function that pauses the processing of tasks
- * until `resume()` is called. Invoke with `queue.pause()`.
- * @property {Function} resume - a function that resumes the processing of
- * queued tasks when the queue is paused. Invoke with `queue.resume()`.
- * @property {Function} kill - a function that removes the `drain` callback and
- * empties remaining tasks from the queue forcing it to go idle. Invoke with `queue.kill()`.
- */
-
-/**
- * Creates a `queue` object with the specified `concurrency`. Tasks added to the
- * `queue` are processed in parallel (up to the `concurrency` limit). If all
- * `worker`s are in progress, the task is queued until one becomes available.
- * Once a `worker` completes a `task`, that `task`'s callback is called.
- *
- * @name queue
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Function} worker - An asynchronous function for processing a queued
- * task, which must call its `callback(err)` argument when finished, with an
- * optional `error` as an argument.  If you want to handle errors from an
- * individual task, pass a callback to `q.push()`. Invoked with
- * (task, callback).
- * @param {number} [concurrency=1] - An `integer` for determining how many
- * `worker` functions should be run in parallel.  If omitted, the concurrency
- * defaults to `1`.  If the concurrency is `0`, an error is thrown.
- * @returns {module:ControlFlow.QueueObject} A queue object to manage the tasks. Callbacks can
- * attached as certain properties to listen for specific events during the
- * lifecycle of the queue.
- * @example
- *
- * // create a queue object with concurrency 2
- * var q = async.queue(function(task, callback) {
- *     console.log('hello ' + task.name);
- *     callback();
- * }, 2);
- *
- * // assign a callback
- * q.drain = function() {
- *     console.log('all items have been processed');
- * };
- *
- * // add some items to the queue
- * q.push({name: 'foo'}, function(err) {
- *     console.log('finished processing foo');
- * });
- * q.push({name: 'bar'}, function (err) {
- *     console.log('finished processing bar');
- * });
- *
- * // add some items to the queue (batch-wise)
- * q.push([{name: 'baz'},{name: 'bay'},{name: 'bax'}], function(err) {
- *     console.log('finished processing item');
- * });
- *
- * // add some items to the front of the queue
- * q.unshift({name: 'bar'}, function (err) {
- *     console.log('finished processing bar');
- * });
- */
-var queue$1 = function (worker, concurrency) {
-  return queue(function (items, cb) {
-    worker(items[0], cb);
-  }, concurrency, 1);
-};
-
-/**
- * The same as [async.queue]{@link module:ControlFlow.queue} only tasks are assigned a priority and
- * completed in ascending priority order.
- *
- * @name priorityQueue
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.queue]{@link module:ControlFlow.queue}
- * @category Control Flow
- * @param {Function} worker - An asynchronous function for processing a queued
- * task, which must call its `callback(err)` argument when finished, with an
- * optional `error` as an argument.  If you want to handle errors from an
- * individual task, pass a callback to `q.push()`. Invoked with
- * (task, callback).
- * @param {number} concurrency - An `integer` for determining how many `worker`
- * functions should be run in parallel.  If omitted, the concurrency defaults to
- * `1`.  If the concurrency is `0`, an error is thrown.
- * @returns {module:ControlFlow.QueueObject} A priorityQueue object to manage the tasks. There are two
- * differences between `queue` and `priorityQueue` objects:
- * * `push(task, priority, [callback])` - `priority` should be a number. If an
- *   array of `tasks` is given, all tasks will be assigned the same priority.
- * * The `unshift` method was removed.
- */
-var priorityQueue = function (worker, concurrency) {
-    // Start with a normal queue
-    var q = queue$1(worker, concurrency);
-
-    // Override push to accept second parameter representing priority
-    q.push = function (data, priority, callback) {
-        if (callback == null) callback = noop;
-        if (typeof callback !== 'function') {
-            throw new Error('task callback must be a function');
-        }
-        q.started = true;
-        if (!isArray(data)) {
-            data = [data];
-        }
-        if (data.length === 0) {
-            // call drain immediately if there are no tasks
-            return setImmediate$1(function () {
-                q.drain();
-            });
-        }
-
-        priority = priority || 0;
-        var nextNode = q._tasks.head;
-        while (nextNode && priority >= nextNode.priority) {
-            nextNode = nextNode.next;
-        }
-
-        for (var i = 0, l = data.length; i < l; i++) {
-            var item = {
-                data: data[i],
-                priority: priority,
-                callback: callback
-            };
-
-            if (nextNode) {
-                q._tasks.insertBefore(nextNode, item);
-            } else {
-                q._tasks.push(item);
-            }
-        }
-        setImmediate$1(q.process);
-    };
-
-    // Remove unshift function
-    delete q.unshift;
-
-    return q;
-};
-
-/**
- * Runs the `tasks` array of functions in parallel, without waiting until the
- * previous function has completed. Once any of the `tasks` complete or pass an
- * error to its callback, the main `callback` is immediately called. It's
- * equivalent to `Promise.race()`.
- *
- * @name race
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Array} tasks - An array containing functions to run. Each function
- * is passed a `callback(err, result)` which it must call on completion with an
- * error `err` (which can be `null`) and an optional `result` value.
- * @param {Function} callback - A callback to run once any of the functions have
- * completed. This function gets an error or result from the first function that
- * completed. Invoked with (err, result).
- * @returns undefined
- * @example
- *
- * async.race([
- *     function(callback) {
- *         setTimeout(function() {
- *             callback(null, 'one');
- *         }, 200);
- *     },
- *     function(callback) {
- *         setTimeout(function() {
- *             callback(null, 'two');
- *         }, 100);
- *     }
- * ],
- * // main callback
- * function(err, result) {
- *     // the result will be equal to 'two' as it finishes earlier
- * });
- */
-function race(tasks, callback) {
-    callback = once(callback || noop);
-    if (!isArray(tasks)) return callback(new TypeError('First argument to race must be an array of functions'));
-    if (!tasks.length) return callback();
-    for (var i = 0, l = tasks.length; i < l; i++) {
-        tasks[i](callback);
-    }
-}
-
-var slice = Array.prototype.slice;
-
-/**
- * Same as [`reduce`]{@link module:Collections.reduce}, only operates on `array` in reverse order.
- *
- * @name reduceRight
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.reduce]{@link module:Collections.reduce}
- * @alias foldr
- * @category Collection
- * @param {Array} array - A collection to iterate over.
- * @param {*} memo - The initial state of the reduction.
- * @param {Function} iteratee - A function applied to each item in the
- * array to produce the next step in the reduction. The `iteratee` is passed a
- * `callback(err, reduction)` which accepts an optional error as its first
- * argument, and the state of the reduction as the second. If an error is
- * passed to the callback, the reduction is stopped and the main `callback` is
- * immediately called with the error. Invoked with (memo, item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Result is the reduced value. Invoked with
- * (err, result).
- */
-function reduceRight(array, memo, iteratee, callback) {
-  var reversed = slice.call(array).reverse();
-  reduce(reversed, memo, iteratee, callback);
-}
-
-/**
- * Wraps the function in another function that always returns data even when it
- * errors.
- *
- * The object returned has either the property `error` or `value`.
- *
- * @name reflect
- * @static
- * @memberOf module:Utils
- * @method
- * @category Util
- * @param {Function} fn - The function you want to wrap
- * @returns {Function} - A function that always passes null to it's callback as
- * the error. The second argument to the callback will be an `object` with
- * either an `error` or a `value` property.
- * @example
- *
- * async.parallel([
- *     async.reflect(function(callback) {
- *         // do some stuff ...
- *         callback(null, 'one');
- *     }),
- *     async.reflect(function(callback) {
- *         // do some more stuff but error ...
- *         callback('bad stuff happened');
- *     }),
- *     async.reflect(function(callback) {
- *         // do some more stuff ...
- *         callback(null, 'two');
- *     })
- * ],
- * // optional callback
- * function(err, results) {
- *     // values
- *     // results[0].value = 'one'
- *     // results[1].error = 'bad stuff happened'
- *     // results[2].value = 'two'
- * });
- */
-function reflect(fn) {
-    return initialParams(function reflectOn(args, reflectCallback) {
-        args.push(rest(function callback(err, cbArgs) {
-            if (err) {
-                reflectCallback(null, {
-                    error: err
-                });
-            } else {
-                var value = null;
-                if (cbArgs.length === 1) {
-                    value = cbArgs[0];
-                } else if (cbArgs.length > 1) {
-                    value = cbArgs;
-                }
-                reflectCallback(null, {
-                    value: value
-                });
-            }
-        }));
-
-        return fn.apply(this, args);
-    });
-}
-
-function reject$1(eachfn, arr, iteratee, callback) {
-    _filter(eachfn, arr, function (value, cb) {
-        iteratee(value, function (err, v) {
-            cb(err, !v);
-        });
-    }, callback);
-}
-
-/**
- * The opposite of [`filter`]{@link module:Collections.filter}. Removes values that pass an `async` truth test.
- *
- * @name reject
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.filter]{@link module:Collections.filter}
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Invoked with (err, results).
- * @example
- *
- * async.reject(['file1','file2','file3'], function(filePath, callback) {
- *     fs.access(filePath, function(err) {
- *         callback(null, !err)
- *     });
- * }, function(err, results) {
- *     // results now equals an array of missing files
- *     createFiles(results);
- * });
- */
-var reject = doParallel(reject$1);
-
-/**
- * A helper function that wraps an array or an object of functions with reflect.
- *
- * @name reflectAll
- * @static
- * @memberOf module:Utils
- * @method
- * @see [async.reflect]{@link module:Utils.reflect}
- * @category Util
- * @param {Array} tasks - The array of functions to wrap in `async.reflect`.
- * @returns {Array} Returns an array of functions, each function wrapped in
- * `async.reflect`
- * @example
- *
- * let tasks = [
- *     function(callback) {
- *         setTimeout(function() {
- *             callback(null, 'one');
- *         }, 200);
- *     },
- *     function(callback) {
- *         // do some more stuff but error ...
- *         callback(new Error('bad stuff happened'));
- *     },
- *     function(callback) {
- *         setTimeout(function() {
- *             callback(null, 'two');
- *         }, 100);
- *     }
- * ];
- *
- * async.parallel(async.reflectAll(tasks),
- * // optional callback
- * function(err, results) {
- *     // values
- *     // results[0].value = 'one'
- *     // results[1].error = Error('bad stuff happened')
- *     // results[2].value = 'two'
- * });
- *
- * // an example using an object instead of an array
- * let tasks = {
- *     one: function(callback) {
- *         setTimeout(function() {
- *             callback(null, 'one');
- *         }, 200);
- *     },
- *     two: function(callback) {
- *         callback('two');
- *     },
- *     three: function(callback) {
- *         setTimeout(function() {
- *             callback(null, 'three');
- *         }, 100);
- *     }
- * };
- *
- * async.parallel(async.reflectAll(tasks),
- * // optional callback
- * function(err, results) {
- *     // values
- *     // results.one.value = 'one'
- *     // results.two.error = 'two'
- *     // results.three.value = 'three'
- * });
- */
-function reflectAll(tasks) {
-    var results;
-    if (isArray(tasks)) {
-        results = arrayMap(tasks, reflect);
-    } else {
-        results = {};
-        baseForOwn(tasks, function (task, key) {
-            results[key] = reflect.call(this, task);
-        });
-    }
-    return results;
-}
-
-/**
- * The same as [`reject`]{@link module:Collections.reject} but runs a maximum of `limit` async operations at a
- * time.
- *
- * @name rejectLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.reject]{@link module:Collections.reject}
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Invoked with (err, results).
- */
-var rejectLimit = doParallelLimit(reject$1);
-
-/**
- * The same as [`reject`]{@link module:Collections.reject} but runs only a single async operation at a time.
- *
- * @name rejectSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.reject]{@link module:Collections.reject}
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in `coll`.
- * The `iteratee` is passed a `callback(err, truthValue)`, which must be called
- * with a boolean argument once it has completed. Invoked with (item, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Invoked with (err, results).
- */
-var rejectSeries = doLimit(rejectLimit, 1);
-
-/**
- * Creates a function that returns `value`.
- *
- * @static
- * @memberOf _
- * @since 2.4.0
- * @category Util
- * @param {*} value The value to return from the new function.
- * @returns {Function} Returns the new constant function.
- * @example
- *
- * var objects = _.times(2, _.constant({ 'a': 1 }));
- *
- * console.log(objects);
- * // => [{ 'a': 1 }, { 'a': 1 }]
- *
- * console.log(objects[0] === objects[1]);
- * // => true
- */
-function constant$1(value) {
-  return function() {
-    return value;
-  };
-}
-
-/**
- * Attempts to get a successful response from `task` no more than `times` times
- * before returning an error. If the task is successful, the `callback` will be
- * passed the result of the successful task. If all attempts fail, the callback
- * will be passed the error and result (if any) of the final attempt.
- *
- * @name retry
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Object|number} [opts = {times: 5, interval: 0}| 5] - Can be either an
- * object with `times` and `interval` or a number.
- * * `times` - The number of attempts to make before giving up.  The default
- *   is `5`.
- * * `interval` - The time to wait between retries, in milliseconds.  The
- *   default is `0`. The interval may also be specified as a function of the
- *   retry count (see example).
- * * `errorFilter` - An optional synchronous function that is invoked on
- *   erroneous result. If it returns `true` the retry attempts will continue;
- *   if the function returns `false` the retry flow is aborted with the current
- *   attempt's error and result being returned to the final callback.
- *   Invoked with (err).
- * * If `opts` is a number, the number specifies the number of times to retry,
- *   with the default interval of `0`.
- * @param {Function} task - A function which receives two arguments: (1) a
- * `callback(err, result)` which must be called when finished, passing `err`
- * (which can be `null`) and the `result` of the function's execution, and (2)
- * a `results` object, containing the results of the previously executed
- * functions (if nested inside another control flow). Invoked with
- * (callback, results).
- * @param {Function} [callback] - An optional callback which is called when the
- * task has succeeded, or after the final failed attempt. It receives the `err`
- * and `result` arguments of the last attempt at completing the `task`. Invoked
- * with (err, results).
- * @example
- *
- * // The `retry` function can be used as a stand-alone control flow by passing
- * // a callback, as shown below:
- *
- * // try calling apiMethod 3 times
- * async.retry(3, apiMethod, function(err, result) {
- *     // do something with the result
- * });
- *
- * // try calling apiMethod 3 times, waiting 200 ms between each retry
- * async.retry({times: 3, interval: 200}, apiMethod, function(err, result) {
- *     // do something with the result
- * });
- *
- * // try calling apiMethod 10 times with exponential backoff
- * // (i.e. intervals of 100, 200, 400, 800, 1600, ... milliseconds)
- * async.retry({
- *   times: 10,
- *   interval: function(retryCount) {
- *     return 50 * Math.pow(2, retryCount);
- *   }
- * }, apiMethod, function(err, result) {
- *     // do something with the result
- * });
- *
- * // try calling apiMethod the default 5 times no delay between each retry
- * async.retry(apiMethod, function(err, result) {
- *     // do something with the result
- * });
- *
- * // try calling apiMethod only when error condition satisfies, all other
- * // errors will abort the retry control flow and return to final callback
- * async.retry({
- *   errorFilter: function(err) {
- *     return err.message === 'Temporary error'; // only retry on a specific error
- *   }
- * }, apiMethod, function(err, result) {
- *     // do something with the result
- * });
- *
- * // It can also be embedded within other control flow functions to retry
- * // individual methods that are not as reliable, like this:
- * async.auto({
- *     users: api.getUsers.bind(api),
- *     payments: async.retry(3, api.getPayments.bind(api))
- * }, function(err, results) {
- *     // do something with the results
- * });
- *
- */
-function retry(opts, task, callback) {
-    var DEFAULT_TIMES = 5;
-    var DEFAULT_INTERVAL = 0;
-
-    var options = {
-        times: DEFAULT_TIMES,
-        intervalFunc: constant$1(DEFAULT_INTERVAL)
-    };
-
-    function parseTimes(acc, t) {
-        if (typeof t === 'object') {
-            acc.times = +t.times || DEFAULT_TIMES;
-
-            acc.intervalFunc = typeof t.interval === 'function' ? t.interval : constant$1(+t.interval || DEFAULT_INTERVAL);
-
-            acc.errorFilter = t.errorFilter;
-        } else if (typeof t === 'number' || typeof t === 'string') {
-            acc.times = +t || DEFAULT_TIMES;
-        } else {
-            throw new Error("Invalid arguments for async.retry");
-        }
-    }
-
-    if (arguments.length < 3 && typeof opts === 'function') {
-        callback = task || noop;
-        task = opts;
-    } else {
-        parseTimes(options, opts);
-        callback = callback || noop;
-    }
-
-    if (typeof task !== 'function') {
-        throw new Error("Invalid arguments for async.retry");
-    }
-
-    var attempt = 1;
-    function retryAttempt() {
-        task(function (err) {
-            if (err && attempt++ < options.times && (typeof options.errorFilter != 'function' || options.errorFilter(err))) {
-                setTimeout(retryAttempt, options.intervalFunc(attempt));
-            } else {
-                callback.apply(null, arguments);
-            }
-        });
-    }
-
-    retryAttempt();
-}
-
-/**
- * A close relative of [`retry`]{@link module:ControlFlow.retry}.  This method wraps a task and makes it
- * retryable, rather than immediately calling it with retries.
- *
- * @name retryable
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.retry]{@link module:ControlFlow.retry}
- * @category Control Flow
- * @param {Object|number} [opts = {times: 5, interval: 0}| 5] - optional
- * options, exactly the same as from `retry`
- * @param {Function} task - the asynchronous function to wrap
- * @returns {Functions} The wrapped function, which when invoked, will retry on
- * an error, based on the parameters specified in `opts`.
- * @example
- *
- * async.auto({
- *     dep1: async.retryable(3, getFromFlakyService),
- *     process: ["dep1", async.retryable(3, function (results, cb) {
- *         maybeProcessData(results.dep1, cb);
- *     })]
- * }, callback);
- */
-var retryable = function (opts, task) {
-    if (!task) {
-        task = opts;
-        opts = null;
-    }
-    return initialParams(function (args, callback) {
-        function taskFn(cb) {
-            task.apply(null, args.concat(cb));
-        }
-
-        if (opts) retry(opts, taskFn, callback);else retry(taskFn, callback);
-    });
-};
-
-/**
- * Run the functions in the `tasks` collection in series, each one running once
- * the previous function has completed. If any functions in the series pass an
- * error to its callback, no more functions are run, and `callback` is
- * immediately called with the value of the error. Otherwise, `callback`
- * receives an array of results when `tasks` have completed.
- *
- * It is also possible to use an object instead of an array. Each property will
- * be run as a function, and the results will be passed to the final `callback`
- * as an object instead of an array. This can be a more readable way of handling
- *  results from {@link async.series}.
- *
- * **Note** that while many implementations preserve the order of object
- * properties, the [ECMAScript Language Specification](http://www.ecma-international.org/ecma-262/5.1/#sec-8.6)
- * explicitly states that
- *
- * > The mechanics and order of enumerating the properties is not specified.
- *
- * So if you rely on the order in which your series of functions are executed,
- * and want this to work on all platforms, consider using an array.
- *
- * @name series
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Array|Iterable|Object} tasks - A collection containing functions to run, each
- * function is passed a `callback(err, result)` it must call on completion with
- * an error `err` (which can be `null`) and an optional `result` value.
- * @param {Function} [callback] - An optional callback to run once all the
- * functions have completed. This function gets a results array (or object)
- * containing all the result arguments passed to the `task` callbacks. Invoked
- * with (err, result).
- * @example
- * async.series([
- *     function(callback) {
- *         // do some stuff ...
- *         callback(null, 'one');
- *     },
- *     function(callback) {
- *         // do some more stuff ...
- *         callback(null, 'two');
- *     }
- * ],
- * // optional callback
- * function(err, results) {
- *     // results is now equal to ['one', 'two']
- * });
- *
- * async.series({
- *     one: function(callback) {
- *         setTimeout(function() {
- *             callback(null, 1);
- *         }, 200);
- *     },
- *     two: function(callback){
- *         setTimeout(function() {
- *             callback(null, 2);
- *         }, 100);
- *     }
- * }, function(err, results) {
- *     // results is now equal to: {one: 1, two: 2}
- * });
- */
-function series(tasks, callback) {
-  _parallel(eachOfSeries, tasks, callback);
-}
-
-/**
- * Returns `true` if at least one element in the `coll` satisfies an async test.
- * If any iteratee call returns `true`, the main `callback` is immediately
- * called.
- *
- * @name some
- * @static
- * @memberOf module:Collections
- * @method
- * @alias any
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in the array
- * in parallel. The iteratee is passed a `callback(err, truthValue)` which must
- * be called with a boolean argument once it has completed. Invoked with
- * (item, callback).
- * @param {Function} [callback] - A callback which is called as soon as any
- * iteratee returns `true`, or after all the iteratee functions have finished.
- * Result will be either `true` or `false` depending on the values of the async
- * tests. Invoked with (err, result).
- * @example
- *
- * async.some(['file1','file2','file3'], function(filePath, callback) {
- *     fs.access(filePath, function(err) {
- *         callback(null, !err)
- *     });
- * }, function(err, result) {
- *     // if result is true then at least one of the files exists
- * });
- */
-var some = _createTester(eachOf, Boolean, identity);
-
-/**
- * The same as [`some`]{@link module:Collections.some} but runs a maximum of `limit` async operations at a time.
- *
- * @name someLimit
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.some]{@link module:Collections.some}
- * @alias anyLimit
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - A truth test to apply to each item in the array
- * in parallel. The iteratee is passed a `callback(err, truthValue)` which must
- * be called with a boolean argument once it has completed. Invoked with
- * (item, callback).
- * @param {Function} [callback] - A callback which is called as soon as any
- * iteratee returns `true`, or after all the iteratee functions have finished.
- * Result will be either `true` or `false` depending on the values of the async
- * tests. Invoked with (err, result).
- */
-var someLimit = _createTester(eachOfLimit, Boolean, identity);
-
-/**
- * The same as [`some`]{@link module:Collections.some} but runs only a single async operation at a time.
- *
- * @name someSeries
- * @static
- * @memberOf module:Collections
- * @method
- * @see [async.some]{@link module:Collections.some}
- * @alias anySeries
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A truth test to apply to each item in the array
- * in parallel. The iteratee is passed a `callback(err, truthValue)` which must
- * be called with a boolean argument once it has completed. Invoked with
- * (item, callback).
- * @param {Function} [callback] - A callback which is called as soon as any
- * iteratee returns `true`, or after all the iteratee functions have finished.
- * Result will be either `true` or `false` depending on the values of the async
- * tests. Invoked with (err, result).
- */
-var someSeries = doLimit(someLimit, 1);
-
-/**
- * Sorts a list by the results of running each `coll` value through an async
- * `iteratee`.
- *
- * @name sortBy
- * @static
- * @memberOf module:Collections
- * @method
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {Function} iteratee - A function to apply to each item in `coll`.
- * The iteratee is passed a `callback(err, sortValue)` which must be called once
- * it has completed with an error (which can be `null`) and a value to use as
- * the sort criteria. Invoked with (item, callback).
- * @param {Function} callback - A callback which is called after all the
- * `iteratee` functions have finished, or an error occurs. Results is the items
- * from the original `coll` sorted by the values returned by the `iteratee`
- * calls. Invoked with (err, results).
- * @example
- *
- * async.sortBy(['file1','file2','file3'], function(file, callback) {
- *     fs.stat(file, function(err, stats) {
- *         callback(err, stats.mtime);
- *     });
- * }, function(err, results) {
- *     // results is now the original array of files sorted by
- *     // modified date
- * });
- *
- * // By modifying the callback parameter the
- * // sorting order can be influenced:
- *
- * // ascending order
- * async.sortBy([1,9,3,5], function(x, callback) {
- *     callback(null, x);
- * }, function(err,result) {
- *     // result callback
- * });
- *
- * // descending order
- * async.sortBy([1,9,3,5], function(x, callback) {
- *     callback(null, x*-1);    //<- x*-1 instead of x, turns the order around
- * }, function(err,result) {
- *     // result callback
- * });
- */
-function sortBy(coll, iteratee, callback) {
-    map(coll, function (x, callback) {
-        iteratee(x, function (err, criteria) {
-            if (err) return callback(err);
-            callback(null, { value: x, criteria: criteria });
-        });
-    }, function (err, results) {
-        if (err) return callback(err);
-        callback(null, arrayMap(results.sort(comparator), baseProperty('value')));
-    });
-
-    function comparator(left, right) {
-        var a = left.criteria,
-            b = right.criteria;
-        return a < b ? -1 : a > b ? 1 : 0;
-    }
-}
-
-/**
- * Sets a time limit on an asynchronous function. If the function does not call
- * its callback within the specified milliseconds, it will be called with a
- * timeout error. The code property for the error object will be `'ETIMEDOUT'`.
- *
- * @name timeout
- * @static
- * @memberOf module:Utils
- * @method
- * @category Util
- * @param {Function} asyncFn - The asynchronous function you want to set the
- * time limit.
- * @param {number} milliseconds - The specified time limit.
- * @param {*} [info] - Any variable you want attached (`string`, `object`, etc)
- * to timeout Error for more information..
- * @returns {Function} Returns a wrapped function that can be used with any of
- * the control flow functions. Invoke this function with the same
- * parameters as you would `asyncFunc`.
- * @example
- *
- * function myFunction(foo, callback) {
- *     doAsyncTask(foo, function(err, data) {
- *         // handle errors
- *         if (err) return callback(err);
- *
- *         // do some stuff ...
- *
- *         // return processed data
- *         return callback(null, data);
- *     });
- * }
- *
- * var wrapped = async.timeout(myFunction, 1000);
- *
- * // call `wrapped` as you would `myFunction`
- * wrapped({ bar: 'bar' }, function(err, data) {
- *     // if `myFunction` takes < 1000 ms to execute, `err`
- *     // and `data` will have their expected values
- *
- *     // else `err` will be an Error with the code 'ETIMEDOUT'
- * });
- */
-function timeout(asyncFn, milliseconds, info) {
-    var originalCallback, timer;
-    var timedOut = false;
-
-    function injectedCallback() {
-        if (!timedOut) {
-            originalCallback.apply(null, arguments);
-            clearTimeout(timer);
-        }
-    }
-
-    function timeoutCallback() {
-        var name = asyncFn.name || 'anonymous';
-        var error = new Error('Callback function "' + name + '" timed out.');
-        error.code = 'ETIMEDOUT';
-        if (info) {
-            error.info = info;
-        }
-        timedOut = true;
-        originalCallback(error);
-    }
-
-    return initialParams(function (args, origCallback) {
-        originalCallback = origCallback;
-        // setup timer and call original function
-        timer = setTimeout(timeoutCallback, milliseconds);
-        asyncFn.apply(null, args.concat(injectedCallback));
-    });
-}
-
-/* Built-in method references for those with the same name as other `lodash` methods. */
-var nativeCeil = Math.ceil;
-var nativeMax$1 = Math.max;
-
-/**
- * The base implementation of `_.range` and `_.rangeRight` which doesn't
- * coerce arguments.
- *
- * @private
- * @param {number} start The start of the range.
- * @param {number} end The end of the range.
- * @param {number} step The value to increment or decrement by.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Array} Returns the range of numbers.
- */
-function baseRange(start, end, step, fromRight) {
-  var index = -1,
-      length = nativeMax$1(nativeCeil((end - start) / (step || 1)), 0),
-      result = Array(length);
-
-  while (length--) {
-    result[fromRight ? length : ++index] = start;
-    start += step;
-  }
-  return result;
-}
-
-/**
- * The same as [times]{@link module:ControlFlow.times} but runs a maximum of `limit` async operations at a
- * time.
- *
- * @name timesLimit
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.times]{@link module:ControlFlow.times}
- * @category Control Flow
- * @param {number} count - The number of times to run the function.
- * @param {number} limit - The maximum number of async operations at a time.
- * @param {Function} iteratee - The function to call `n` times. Invoked with the
- * iteration index and a callback (n, next).
- * @param {Function} callback - see [async.map]{@link module:Collections.map}.
- */
-function timeLimit(count, limit, iteratee, callback) {
-  mapLimit(baseRange(0, count, 1), limit, iteratee, callback);
-}
-
-/**
- * Calls the `iteratee` function `n` times, and accumulates results in the same
- * manner you would use with [map]{@link module:Collections.map}.
- *
- * @name times
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.map]{@link module:Collections.map}
- * @category Control Flow
- * @param {number} n - The number of times to run the function.
- * @param {Function} iteratee - The function to call `n` times. Invoked with the
- * iteration index and a callback (n, next).
- * @param {Function} callback - see {@link module:Collections.map}.
- * @example
- *
- * // Pretend this is some complicated async factory
- * var createUser = function(id, callback) {
- *     callback(null, {
- *         id: 'user' + id
- *     });
- * };
- *
- * // generate 5 users
- * async.times(5, function(n, next) {
- *     createUser(n, function(err, user) {
- *         next(err, user);
- *     });
- * }, function(err, users) {
- *     // we should now have 5 users
- * });
- */
-var times = doLimit(timeLimit, Infinity);
-
-/**
- * The same as [times]{@link module:ControlFlow.times} but runs only a single async operation at a time.
- *
- * @name timesSeries
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.times]{@link module:ControlFlow.times}
- * @category Control Flow
- * @param {number} n - The number of times to run the function.
- * @param {Function} iteratee - The function to call `n` times. Invoked with the
- * iteration index and a callback (n, next).
- * @param {Function} callback - see {@link module:Collections.map}.
- */
-var timesSeries = doLimit(timeLimit, 1);
-
-/**
- * A relative of `reduce`.  Takes an Object or Array, and iterates over each
- * element in series, each step potentially mutating an `accumulator` value.
- * The type of the accumulator defaults to the type of collection passed in.
- *
- * @name transform
- * @static
- * @memberOf module:Collections
- * @method
- * @category Collection
- * @param {Array|Iterable|Object} coll - A collection to iterate over.
- * @param {*} [accumulator] - The initial state of the transform.  If omitted,
- * it will default to an empty Object or Array, depending on the type of `coll`
- * @param {Function} iteratee - A function applied to each item in the
- * collection that potentially modifies the accumulator. The `iteratee` is
- * passed a `callback(err)` which accepts an optional error as its first
- * argument. If an error is passed to the callback, the transform is stopped
- * and the main `callback` is immediately called with the error.
- * Invoked with (accumulator, item, key, callback).
- * @param {Function} [callback] - A callback which is called after all the
- * `iteratee` functions have finished. Result is the transformed accumulator.
- * Invoked with (err, result).
- * @example
- *
- * async.transform([1,2,3], function(acc, item, index, callback) {
- *     // pointless async:
- *     process.nextTick(function() {
- *         acc.push(item * 2)
- *         callback(null)
- *     });
- * }, function(err, result) {
- *     // result is now equal to [2, 4, 6]
- * });
- *
- * @example
- *
- * async.transform({a: 1, b: 2, c: 3}, function (obj, val, key, callback) {
- *     setImmediate(function () {
- *         obj[key] = val * 2;
- *         callback();
- *     })
- * }, function (err, result) {
- *     // result is equal to {a: 2, b: 4, c: 6}
- * })
- */
-function transform(coll, accumulator, iteratee, callback) {
-    if (arguments.length === 3) {
-        callback = iteratee;
-        iteratee = accumulator;
-        accumulator = isArray(coll) ? [] : {};
-    }
-    callback = once(callback || noop);
-
-    eachOf(coll, function (v, k, cb) {
-        iteratee(accumulator, v, k, cb);
-    }, function (err) {
-        callback(err, accumulator);
-    });
-}
-
-/**
- * Undoes a [memoize]{@link module:Utils.memoize}d function, reverting it to the original,
- * unmemoized form. Handy for testing.
- *
- * @name unmemoize
- * @static
- * @memberOf module:Utils
- * @method
- * @see [async.memoize]{@link module:Utils.memoize}
- * @category Util
- * @param {Function} fn - the memoized function
- * @returns {Function} a function that calls the original unmemoized function
- */
-function unmemoize(fn) {
-    return function () {
-        return (fn.unmemoized || fn).apply(null, arguments);
-    };
-}
-
-/**
- * Repeatedly call `iteratee`, while `test` returns `true`. Calls `callback` when
- * stopped, or an error occurs.
- *
- * @name whilst
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Function} test - synchronous truth test to perform before each
- * execution of `iteratee`. Invoked with ().
- * @param {Function} iteratee - A function which is called each time `test` passes.
- * The function is passed a `callback(err)`, which must be called once it has
- * completed with an optional `err` argument. Invoked with (callback).
- * @param {Function} [callback] - A callback which is called after the test
- * function has failed and repeated execution of `iteratee` has stopped. `callback`
- * will be passed an error and any arguments passed to the final `iteratee`'s
- * callback. Invoked with (err, [results]);
- * @returns undefined
- * @example
- *
- * var count = 0;
- * async.whilst(
- *     function() { return count < 5; },
- *     function(callback) {
- *         count++;
- *         setTimeout(function() {
- *             callback(null, count);
- *         }, 1000);
- *     },
- *     function (err, n) {
- *         // 5 seconds have passed, n = 5
- *     }
- * );
- */
-function whilst(test, iteratee, callback) {
-    callback = onlyOnce(callback || noop);
-    if (!test()) return callback(null);
-    var next = rest(function (err, args) {
-        if (err) return callback(err);
-        if (test()) return iteratee(next);
-        callback.apply(null, [null].concat(args));
-    });
-    iteratee(next);
-}
-
-/**
- * Repeatedly call `fn` until `test` returns `true`. Calls `callback` when
- * stopped, or an error occurs. `callback` will be passed an error and any
- * arguments passed to the final `fn`'s callback.
- *
- * The inverse of [whilst]{@link module:ControlFlow.whilst}.
- *
- * @name until
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @see [async.whilst]{@link module:ControlFlow.whilst}
- * @category Control Flow
- * @param {Function} test - synchronous truth test to perform before each
- * execution of `fn`. Invoked with ().
- * @param {Function} fn - A function which is called each time `test` fails.
- * The function is passed a `callback(err)`, which must be called once it has
- * completed with an optional `err` argument. Invoked with (callback).
- * @param {Function} [callback] - A callback which is called after the test
- * function has passed and repeated execution of `fn` has stopped. `callback`
- * will be passed an error and any arguments passed to the final `fn`'s
- * callback. Invoked with (err, [results]);
- */
-function until(test, fn, callback) {
-    whilst(function () {
-        return !test.apply(this, arguments);
-    }, fn, callback);
-}
-
-/**
- * Runs the `tasks` array of functions in series, each passing their results to
- * the next in the array. However, if any of the `tasks` pass an error to their
- * own callback, the next function is not executed, and the main `callback` is
- * immediately called with the error.
- *
- * @name waterfall
- * @static
- * @memberOf module:ControlFlow
- * @method
- * @category Control Flow
- * @param {Array} tasks - An array of functions to run, each function is passed
- * a `callback(err, result1, result2, ...)` it must call on completion. The
- * first argument is an error (which can be `null`) and any further arguments
- * will be passed as arguments in order to the next task.
- * @param {Function} [callback] - An optional callback to run once all the
- * functions have completed. This will be passed the results of the last task's
- * callback. Invoked with (err, [results]).
- * @returns undefined
- * @example
- *
- * async.waterfall([
- *     function(callback) {
- *         callback(null, 'one', 'two');
- *     },
- *     function(arg1, arg2, callback) {
- *         // arg1 now equals 'one' and arg2 now equals 'two'
- *         callback(null, 'three');
- *     },
- *     function(arg1, callback) {
- *         // arg1 now equals 'three'
- *         callback(null, 'done');
- *     }
- * ], function (err, result) {
- *     // result now equals 'done'
- * });
- *
- * // Or, with named functions:
- * async.waterfall([
- *     myFirstFunction,
- *     mySecondFunction,
- *     myLastFunction,
- * ], function (err, result) {
- *     // result now equals 'done'
- * });
- * function myFirstFunction(callback) {
- *     callback(null, 'one', 'two');
- * }
- * function mySecondFunction(arg1, arg2, callback) {
- *     // arg1 now equals 'one' and arg2 now equals 'two'
- *     callback(null, 'three');
- * }
- * function myLastFunction(arg1, callback) {
- *     // arg1 now equals 'three'
- *     callback(null, 'done');
- * }
- */
-var waterfall = function (tasks, callback) {
-    callback = once(callback || noop);
-    if (!isArray(tasks)) return callback(new Error('First argument to waterfall must be an array of functions'));
-    if (!tasks.length) return callback();
-    var taskIndex = 0;
-
-    function nextTask(args) {
-        if (taskIndex === tasks.length) {
-            return callback.apply(null, [null].concat(args));
-        }
-
-        var taskCallback = onlyOnce(rest(function (err, args) {
-            if (err) {
-                return callback.apply(null, [err].concat(args));
-            }
-            nextTask(args);
-        }));
-
-        args.push(taskCallback);
-
-        var task = tasks[taskIndex++];
-        task.apply(null, args);
-    }
-
-    nextTask([]);
-};
-
-/**
- * Async is a utility module which provides straight-forward, powerful functions
- * for working with asynchronous JavaScript. Although originally designed for
- * use with [Node.js](http://nodejs.org) and installable via
- * `npm install --save async`, it can also be used directly in the browser.
- * @module async
- */
-
-/**
- * A collection of `async` functions for manipulating collections, such as
- * arrays and objects.
- * @module Collections
- */
-
-/**
- * A collection of `async` functions for controlling the flow through a script.
- * @module ControlFlow
- */
-
-/**
- * A collection of `async` utility functions.
- * @module Utils
- */
-var index = {
-  applyEach: applyEach,
-  applyEachSeries: applyEachSeries,
-  apply: apply$2,
-  asyncify: asyncify,
-  auto: auto,
-  autoInject: autoInject,
-  cargo: cargo,
-  compose: compose,
-  concat: concat,
-  concatSeries: concatSeries,
-  constant: constant,
-  detect: detect,
-  detectLimit: detectLimit,
-  detectSeries: detectSeries,
-  dir: dir,
-  doDuring: doDuring,
-  doUntil: doUntil,
-  doWhilst: doWhilst,
-  during: during,
-  each: eachLimit,
-  eachLimit: eachLimit$1,
-  eachOf: eachOf,
-  eachOfLimit: eachOfLimit,
-  eachOfSeries: eachOfSeries,
-  eachSeries: eachSeries,
-  ensureAsync: ensureAsync,
-  every: every,
-  everyLimit: everyLimit,
-  everySeries: everySeries,
-  filter: filter,
-  filterLimit: filterLimit,
-  filterSeries: filterSeries,
-  forever: forever,
-  log: log,
-  map: map,
-  mapLimit: mapLimit,
-  mapSeries: mapSeries,
-  mapValues: mapValues,
-  mapValuesLimit: mapValuesLimit,
-  mapValuesSeries: mapValuesSeries,
-  memoize: memoize,
-  nextTick: nextTick,
-  parallel: parallelLimit,
-  parallelLimit: parallelLimit$1,
-  priorityQueue: priorityQueue,
-  queue: queue$1,
-  race: race,
-  reduce: reduce,
-  reduceRight: reduceRight,
-  reflect: reflect,
-  reflectAll: reflectAll,
-  reject: reject,
-  rejectLimit: rejectLimit,
-  rejectSeries: rejectSeries,
-  retry: retry,
-  retryable: retryable,
-  seq: seq$1,
-  series: series,
-  setImmediate: setImmediate$1,
-  some: some,
-  someLimit: someLimit,
-  someSeries: someSeries,
-  sortBy: sortBy,
-  timeout: timeout,
-  times: times,
-  timesLimit: timeLimit,
-  timesSeries: timesSeries,
-  transform: transform,
-  unmemoize: unmemoize,
-  until: until,
-  waterfall: waterfall,
-  whilst: whilst,
-
-  // aliases
-  all: every,
-  any: some,
-  forEach: eachLimit,
-  forEachSeries: eachSeries,
-  forEachLimit: eachLimit$1,
-  forEachOf: eachOf,
-  forEachOfSeries: eachOfSeries,
-  forEachOfLimit: eachOfLimit,
-  inject: reduce,
-  foldl: reduce,
-  foldr: reduceRight,
-  select: filter,
-  selectLimit: filterLimit,
-  selectSeries: filterSeries,
-  wrapSync: asyncify
-};
-
-exports['default'] = index;
-exports.applyEach = applyEach;
-exports.applyEachSeries = applyEachSeries;
-exports.apply = apply$2;
-exports.asyncify = asyncify;
-exports.auto = auto;
-exports.autoInject = autoInject;
-exports.cargo = cargo;
-exports.compose = compose;
-exports.concat = concat;
-exports.concatSeries = concatSeries;
-exports.constant = constant;
-exports.detect = detect;
-exports.detectLimit = detectLimit;
-exports.detectSeries = detectSeries;
-exports.dir = dir;
-exports.doDuring = doDuring;
-exports.doUntil = doUntil;
-exports.doWhilst = doWhilst;
-exports.during = during;
-exports.each = eachLimit;
-exports.eachLimit = eachLimit$1;
-exports.eachOf = eachOf;
-exports.eachOfLimit = eachOfLimit;
-exports.eachOfSeries = eachOfSeries;
-exports.eachSeries = eachSeries;
-exports.ensureAsync = ensureAsync;
-exports.every = every;
-exports.everyLimit = everyLimit;
-exports.everySeries = everySeries;
-exports.filter = filter;
-exports.filterLimit = filterLimit;
-exports.filterSeries = filterSeries;
-exports.forever = forever;
-exports.log = log;
-exports.map = map;
-exports.mapLimit = mapLimit;
-exports.mapSeries = mapSeries;
-exports.mapValues = mapValues;
-exports.mapValuesLimit = mapValuesLimit;
-exports.mapValuesSeries = mapValuesSeries;
-exports.memoize = memoize;
-exports.nextTick = nextTick;
-exports.parallel = parallelLimit;
-exports.parallelLimit = parallelLimit$1;
-exports.priorityQueue = priorityQueue;
-exports.queue = queue$1;
-exports.race = race;
-exports.reduce = reduce;
-exports.reduceRight = reduceRight;
-exports.reflect = reflect;
-exports.reflectAll = reflectAll;
-exports.reject = reject;
-exports.rejectLimit = rejectLimit;
-exports.rejectSeries = rejectSeries;
-exports.retry = retry;
-exports.retryable = retryable;
-exports.seq = seq$1;
-exports.series = series;
-exports.setImmediate = setImmediate$1;
-exports.some = some;
-exports.someLimit = someLimit;
-exports.someSeries = someSeries;
-exports.sortBy = sortBy;
-exports.timeout = timeout;
-exports.times = times;
-exports.timesLimit = timeLimit;
-exports.timesSeries = timesSeries;
-exports.transform = transform;
-exports.unmemoize = unmemoize;
-exports.until = until;
-exports.waterfall = waterfall;
-exports.whilst = whilst;
-exports.all = every;
-exports.allLimit = everyLimit;
-exports.allSeries = everySeries;
-exports.any = some;
-exports.anyLimit = someLimit;
-exports.anySeries = someSeries;
-exports.find = detect;
-exports.findLimit = detectLimit;
-exports.findSeries = detectSeries;
-exports.forEach = eachLimit;
-exports.forEachSeries = eachSeries;
-exports.forEachLimit = eachLimit$1;
-exports.forEachOf = eachOf;
-exports.forEachOfSeries = eachOfSeries;
-exports.forEachOfLimit = eachOfLimit;
-exports.inject = reduce;
-exports.foldl = reduce;
-exports.foldr = reduceRight;
-exports.select = filter;
-exports.selectLimit = filterLimit;
-exports.selectSeries = filterSeries;
-exports.wrapSync = asyncify;
-
-Object.defineProperty(exports, '__esModule', { value: true });
-
-})));
diff --git a/RPCTests/package.json b/RPCTests/package.json
index 1162ada7f..aeb1c2755 100644
--- a/RPCTests/package.json
+++ b/RPCTests/package.json
@@ -4,7 +4,8 @@
   "description": "Ethereum cpp client RPC tests",
   "main": "./main.js",
   "devDependencies": {    
-    "web3": "^0.15.3"
+    "web3": "^0.15.3",
+    "async": "^1.5"
   },
   "scripts": {