attachChangeCreation(oControl, fnCallback) {
			var sFlexReference = FlexRuntimeInfoAPI.getFlexReference({element: oControl});
			mChangeCreationListeners[sFlexReference] = (mChangeCreationListeners[sFlexReference] || []).concat(fnCallback);
		}
Registers the provided callback function to be called when personalization changes are
added for the flex reference that the given control belongs to.

@param {sap.ui.core.Control} oControl - Reference control to get the flex reference
@param {function} fnCallback - Function to be called on change creation
@private
@sapui5-restricted sap.ui.rta