FilePayload.fromJson constructor
Implementation
factory FilePayload.fromJson(Map<String, Object?> j) => FilePayload(
url: j['url'] as String? ?? '',
filename: j['filename'] as String? ?? 'file',
mimeType: j['mimeType'] as String? ?? 'application/octet-stream',
fileSizeBytes: j['fileSizeBytes'] as int?,
);