public function search($query) {
        global $CFG;
        if ($result = parent::search($query)) {
            return $result;
        }

        $found = false;
        $filternames = filter_get_all_installed();
        foreach ($filternames as $path => $strfiltername) {
            if (strpos(core_text::strtolower($strfiltername), $query) !== false) {
                $found = true;
                break;
            }
            if (strpos($path, $query) !== false) {
                $found = true;
                break;
            }
        }

        if ($found) {
            $result = new stdClass;
            $result->page = $this;
            $result->settings = array();
            return array($this->name => $result);
        } else {
            return array();
        }
    }