code: function( splitter ) {
  		var items = this._getItemsForSplitter( splitter ),
  			minSize = this.layoutManager.config.dimensions[ this._isColumn ? 'minItemHeight' : 'minItemWidth' ];
  	
  		this._splitterPosition = 0;
  		this._splitterMinPosition = -1 * ( items.before.element[ this._dimension ]() - minSize );
  		this._splitterMaxPosition = items.after.element[ this._dimension ]() - minSize;
  	}
docs: Invoked when a splitter's dragListener fires dragStart. Calculates the splitters
  movement area once (so that it doesn't need calculating on every mousemove event)
  
  @param   {lm.controls.Splitter} splitter
  
  @returns {void}