phpbb\notification\type\group_request::is_available PHP Method

    public function is_available()
    {
        // Leader of any groups?
        $sql = 'SELECT group_id
			FROM ' . USER_GROUP_TABLE . '
			WHERE user_id = ' . (int) $this->user->data['user_id'] . '
				AND group_leader = 1';
        $result = $this->db->sql_query_limit($sql, 1);
        $row = $this->db->sql_fetchrow($result);
        $this->db->sql_freeresult($result);
        return !empty($row) ? true : false;
    }