protected function _ensureRounds()
    {
        if (! is_array($this->_rounds)) {
            $roundSelect = $this->db->select();
            $roundSelect->from('gems__rounds')
                ->where('gro_id_track = ?', $this->_trackId)
                ->order('gro_id_order');

            // \MUtil_Echo::r((string) $roundSelect);

            $this->_rounds  = array();
            foreach ($roundSelect->query()->fetchAll() as $round) {
                $this->_rounds[$round['gro_id_round']] = $round;
            }
        }
    }