/** * Get the locktime for this grade. * * @return int $locktime timestamp for lock to activate */ public function get_locktime() { $this->load_grade_item(); $item_locktime = $this->grade_item->get_locktime(); if (empty($this->locktime) or $item_locktime and $item_locktime < $this->locktime) { return $item_locktime; } else { return $this->locktime; } }