EmpathyTpGroup @empathytpgroup: the object which received the signal. @arg1: @arg2: @arg3: @arg4: @empathytpgroup: the object which received the signal. @arg1: @arg2: @arg3: @arg4: @empathytpgroup: the object which received the signal. @arg1: @arg2: @arg3: @arg4: @empathytpgroup: the object which received the signal. @arg1: @arg2: @arg3: @arg4: @member: @actor: @reason: @message: @tp_chan: @tp_conn: @Returns: @group: @handles: @message: @group: @handle: @message: @group: @handle: @message: @group: @handle: @message: @group: @Returns: @group: @members: @local_pending: @remote_pending: @group: @Returns: @infos: @group: @Returns: @group: @Returns: @group: @Returns: @group: @handle: @Returns: