WC_Data::delete_meta_data_by_mid PHP 메소드

    public function delete_meta_data_by_mid($mid)
    {
        $array_keys = array_keys(wp_list_pluck($this->meta_data, 'id'), $mid);
        if ($array_keys) {
            foreach ($array_keys as $array_key) {
                $this->meta_data[$array_key]->value = null;
            }
        }
    }