 
 package spark.components
 {
+import flash.events.Event;
+
 import mx.core.ClassFactory;
 import mx.core.IFactory;
 import mx.core.mx_internal;
 import mx.utils.BitFlagUtil;
 
-import spark.components.supportClasses.ButtonBase;
 import spark.components.supportClasses.DropDownController;
 import spark.core.ContainerDestructionPolicy;
 import spark.events.DropDownEvent;

            setCallout(createDynamicPartInstance("dropDown") as Callout);
        
        if (callout)
            callout.open(this, false);
    }
    
    /**

        // destroyed by calloutDestructionPolicy
        if (callout)
        {
            removeEventListener(Event.REMOVED_FROM_STAGE, button_removedFromStage);
            
            // TODO (jasonsj): close params?
            // Dispatch the close event after the callout's PopUpEvent.CLOSE fires
            callout.close();
        }
