Publication\Model\Publication::getTypeDisplayDate PHP Method

    public function getTypeDisplayDate()
    {
        if ($this->type_id) {
            $types = Type::cachedListArray(['key' => 'id', 'value' => 'display_date']);
            if (array_key_exists($this->type_id, $types)) {
                return $types[$this->type_id];
            }
        }
    }