fnRegisterNotifierToEvents = function(that, oNotifier) {
			oNotifier.attachEvent("_childControlCalling", that._eventListener, that);
		}
This attaches the given notifier to all necessary events that a notifier
can trigger. A transformation is needed because 'this' in this method is
the window instance

@param {sap.ui.ux3.NotificationBar}
           The bar itself since 'this' is the window's instance
@param {sap.ui.ux3.Notifier}
           oNotifier that should be registered