[SAPUI5] - Get registered events from control

Question:

How can I get the registered events from a control?

suppose I have a button with a press event, which has an event handler.

From the controller, I know I can use this.getView().byId("buttonid").mEventRegistry.

This will return me an object with all bound events of the control.

Via Object.Keys I can get an array of the event names, and continue my way.

Here's the catch though: mEventRegistry is a private property, which I'm not supposed to use

But there isn't any "getEventRegistry()" method.

So how can I do this the correct way?