/** * {@inheritdoc} */ public function getActiveTrailIds($menu_name) { // Parent ids; used both as key and value to ensure uniqueness. // We always want all the top-level links with parent == ''. $active_trail = array('' => ''); // If a link in the given menu indeed matches the route, then use it to // complete the active trail. if ($active_link = $this->getActiveLink($menu_name)) { if ($parents = $this->menuLinkManager->getParentIds($active_link->getPluginId())) { $active_trail = $parents + $active_trail; } } return $active_trail; }