src/vs/editor/contrib/gotoSymbol/peek/referencesWidget.ts/ReferenceWidget/setModel
class ReferenceWidget:	setModel(newModel: ReferencesModel | undefined): Promise<any> {
		// clean up
		this._disposeOnNewModel.clear();
		this._model = newModel;
		if (this._model) {
			return this._onNewModel();
		}
		return Promise.resolve();
	}