code: function( x, y ) {
  		var itemConfig = this._itemConfig;
  		if( lm.utils.isFunction( itemConfig ) ) {
  			itemConfig = itemConfig();
  		}
  		var contentItem = this._layoutManager._$normalizeContentItem( $.extend( true, {}, itemConfig ) ),
  			dragProxy = new lm.controls.DragProxy( x, y, this._dragListener, this._layoutManager, contentItem, null );
  
  		this._layoutManager.transitionIndicator.transitionElements( this._element, dragProxy.element );
  	}
docs: Callback for the DragListener's dragStart event
  
  @param   {int} x the x position of the mouse on dragStart
  @param   {int} y the x position of the mouse on dragStart
  
  @returns {void}