src/vs/editor/contrib/gotoSymbol/browser/goToCommands.ts/SymbolNavigationAction/_openInPeek
class SymbolNavigationAction:	private _openInPeek(target: ICodeEditor, model: ReferencesModel) {
		const controller = ReferencesController.get(target);
		if (controller && target.hasModel()) {
			controller.toggleWidget(target.getSelection(), createCancelablePromise(_ => Promise.resolve(model)), this.configuration.openInPeek);
		} else {
			model.dispose();
		}
	}