src/vs/workbench/contrib/preferences/browser/keybindingWidgets.ts/DefineKeybindingOverlayWidget/constructor
class DefineKeybindingOverlayWidget:	constructor(private _editor: ICodeEditor,
		@IInstantiationService instantiationService: IInstantiationService
	) {
		super();

		this._widget = instantiationService.createInstance(DefineKeybindingWidget, null);
		this._editor.addOverlayWidget(this);
	}