/**
 * Sorted list abstract data structure.
 *
 * @class
 * @abstract
 * @mixes OO.EventEmitter
 * @mixes OO.SortedEmitterList
 *
 * @constructor
 */
mw.echo.dm.SortedList = function MwEchoDmSortedList() {
	// Mixin constructors
	OO.EventEmitter.call( this );
	OO.SortedEmitterList.call( this );
};

/* Initialization */

OO.mixinClass( mw.echo.dm.SortedList, OO.EventEmitter );
OO.mixinClass( mw.echo.dm.SortedList, OO.SortedEmitterList );

/**
 * Defines whether or not this list contains items
 * or lists of items.
 *
 * @return {boolean} This list is a group
 */
mw.echo.dm.SortedList.prototype.isGroup = null;
