toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (downloadUrl != null) 'download_url': downloadUrl!,
if (encryptedKey != null) 'encrypted_key': encryptedKey!,
if (language != null) 'language': language!,
if (size != null) 'size': size!,
if (version != null) 'version': version!,
};