code: public function decode($value, Field $field, Codec $codec = null)
      {
          if (empty($value)) {
              return null;
          }
  
          /** @var Identifier $className */
          $className = $field->getClassName();
  
          try {
              return $className::fromString((string) $value);
          } catch (\Exception $e) {
              throw new DecodeValueFailed($value, $field, $e->getMessage());
          }
      }
docs: {@inheritdoc}