src/vs/editor/contrib/gotoSymbol/peek/referencesController.ts/ReferencesController/closeWidget
class ReferencesController:	closeWidget(focusEditor = true): void {
		this._widget?.dispose();
		this._model?.dispose();
		this._referenceSearchVisible.reset();
		this._disposables.clear();
		this._widget = undefined;
		this._model = undefined;
		if (focusEditor) {
			this._editor.focus();
		}
		this._requestIdPool += 1; // Cancel pending requests
	}