Anybody seen removeCallBack()?

Well this is just a random thought , nothing serious or really big… But if I can add an external call back using ExternalInterface.addCallBack() method and thereby make the particular method visible to the other objects in DOM, why wouldn’t I need an ExternalInterface.removeCallBack() to make the same method invisible to the external object.
Just like an addEventListener() and a removeEventListener() work… :crazy:

Wondering Aloud…