src/control/SearchResults.php
public function getMenu($level = 1)
    {
        if (class_exists(ContentController::class)) {
            $controller = ContentController::singleton();
            return $controller->getMenu($level);
        }
    }
public function getMenu($level = 1)
    {
        if (class_exists(ContentController::class)) {
            $controller = ContentController::singleton();
            return $controller->getMenu($level);
        }
    }
If content controller exists, return it's menu function
@param int $level Menu level to return.
@return ArrayList