code: public function jsonSerialize()
      {
          $json = [];
  
          if (null !== $this->mediaId) {
              $json['mediaId'] = $this->mediaId;
          }
          if (null !== $this->filename) {
              $json['filename'] = $this->filename;
          }
          if (null !== $this->uploaded) {
              $json['uploaded'] = $this->uploaded->format(\DateTime::ISO8601);
          }
          if (null !== $this->replacedBy) {
              $json['replacedBy'] = $this->replacedBy;
          }
          if (null !== $this->comment) {
              $json['comment'] = $this->comment;
          }
          if (null !== $this->userId) {
              $json['userId'] = $this->userId;
          }
          if (null !== $this->version) {
              $json['version'] = $this->version;
          }
  
          return $json;
      }
docs: Gets all data that should be available in a json representation.
  
  @return array an associative array of the available variables