src/vs/platform/keybinding/common/abstractKeybindingService.ts/AbstractKeybindingService/onDidUpdateKeybindings
class AbstractKeybindingService:	get onDidUpdateKeybindings(): Event<IKeybindingEvent> {
		return this._onDidUpdateKeybindings ? this._onDidUpdateKeybindings.event : Event.None; // Sinon stubbing walks properties on prototype
	}