 import mx.effects.Effect;
 import mx.effects.IEffectInstance;
 import mx.events.EffectEvent;
+import mx.geom.TransformOffsets;
 import mx.styles.IStyleClient;
 
 import spark.effects.supportClasses.AnimateTransformInstance;

        if (transformInstance.initialized)
            return;
        transformInstance.initialized = true;
        
        transformInstance.transformCenter = 
            computeTransformCenterForTarget(instance.target);

            (!(value is Number) && value !== null));
    }



    /**
     * @private
     * 
