code: function( x, y ) {
  		var segment, area;
  
  		for( segment in this._contentAreaDimensions ) {
  			area = this._contentAreaDimensions[ segment ].hoverArea;
  
  			if( area.x1 < x && area.x2 > x && area.y1 < y && area.y2 > y ) {
  
  				if( segment === 'header' ) {
  					this._dropSegment = 'header';
  					this._highlightHeaderDropZone( this._sided ? y : x );
  				} else {
  					this._resetHeaderDropZone();
  					this._highlightBodyDropZone( segment );
  				}
  
  				return;
  			}
  		}
  	}
docs: If the user hovers above the header part of the stack, indicate drop positions for tabs.
  otherwise indicate which segment of the body the dragged item would be dropped on
  
  @param    {Int} x Absolute Screen X
  @param    {Int} y Absolute Screen Y
  
  @returns {void}