src/vs/base/parts/quickinput/browser/quickInputBox.ts/QuickInputBox/onKeyDown
class QuickInputBox:	onKeyDown = (handler: (event: StandardKeyboardEvent) => void): IDisposable => {
		return dom.addDisposableListener(this.findInput.inputBox.inputElement, dom.EventType.KEY_DOWN, (e: KeyboardEvent) => {
			handler(new StandardKeyboardEvent(e));
		});
	};