EmpathyChatroomManager @empathychatroommanager: the object which received the signal. @arg1: @empathychatroommanager: the object which received the signal. @arg1: @Returns: @manager: @chatroom: @Returns: @manager: @chatroom: @manager: @account: @room: @Returns: @manager: @account: @Returns: @manager: @account: @Returns: @manager: