 import flash.events.MouseEvent;
 import flash.ui.Keyboard;
 
+import spark.components.supportClasses.ListBase;
+import spark.events.RendererExistenceEvent;
+
 import mx.collections.IList;
-import spark.components.supportClasses.ListBase;
 import mx.core.EventPriority;
 import mx.core.IFactory;
 import mx.core.IVisualElement;

            if (renderer is IVisualElement)
                IVisualElement(renderer).owner = this; 
            if (renderer is IItemRenderer)
                IItemRenderer(renderer).allowDeselection = !requiresSelection;
        }
            
        if (isItemIndexSelected(index))

import mx.events.CollectionEvent;
import mx.events.CollectionEventKind;
import mx.events.ItemClickEvent;
import mx.managers.IFocusManagerComponent;

[IconFile("ButtonBar.png")]
