 { 
 import flash.events.Event;
 import flash.events.MouseEvent;
-import flash.geom.Rectangle;
+import flash.geom.Point;
 
 import mx.collections.IList;
 import mx.core.ClassFactory;
 import mx.core.IFactory;
 import mx.core.IVisualElement;
 import mx.core.mx_internal;
-import mx.events.CollectionEvent;
-import mx.events.CollectionEventKind;
+import mx.managers.CursorManager;
 import mx.managers.IFocusManagerComponent;
 
+import spark.components.supportClasses.ColumnHeaderBarLayout;
 import spark.components.supportClasses.DefaultColumnHeaderRenderer;
 import spark.components.supportClasses.GridColumn;
 import spark.events.RendererExistenceEvent;

            dataGroup.removeEventListener(RendererExistenceEvent.RENDERER_ADD, dataGroup_rendererAddHandler);
            dataGroup.removeEventListener(RendererExistenceEvent.RENDERER_REMOVE, dataGroup_rendererRemoveHandler);
            horizontalScrollPosition = 0;
        }

        super.partRemoved(partName, instance);

 *  @playerversion AIR 2.0
 *  @productversion Flex 4.5
 */
public class ColumnHeaderBar extends SkinnableDataContainer 
    implements IFocusManagerComponent 
{
    include "../core/Version.as";

