public function get_url() {
        $urlparams = [];
        if ($policyid = $this->get_policy_id_filter()) {
            $urlparams['policyid'] = $policyid;
        }
        if ($versionid = $this->get_version_id_filter()) {
            $urlparams['versionid'] = $versionid;
        }
        $i = 0;
        foreach ($this->filtersapplied as $filter) {
            if ($filter[0] != self::FILTER_POLICYID && $filter[0] != self::FILTER_VERSIONID) {
                if ($filter[0] == self::FILTER_SEARCH_STRING) {
                    $urlparams['unified-filters['.($i++).']'] = $filter[1];
                } else {
                    $urlparams['unified-filters['.($i++).']'] = join(':', $filter);
                }
            }
        }
        return new \moodle_url('/admin/tool/policy/acceptances.php', $urlparams);
    }