Core UI mixin that all interface subclasses should extend
instead of MovieClip for standardized UI initialization.
Note: CoreClip should only be used for classes which will
extend library clips via linkage id. If you are using
ClassUtils to extend a class use
BaseClip as the onLoad event
will have fired before the clip is extended.
public function onLoad():Void
onLoad does core setup when clip registers on stage via onLoad. Do not override this in subclasses; instead override configUI.
Void