toJson method
Implementation
Map<String, dynamic> toJson() => <String, dynamic>{
"k": key,
"f": file,
"s": size,
"c": created.millisecondsSinceEpoch,
"a": accessed.millisecondsSinceEpoch,
if (expires != null) "e": expires!.millisecondsSinceEpoch,
if (mimeType != null) "m": mimeType,
if (sha256 != null) "h": sha256,
if (tags.isNotEmpty) "t": tags,
};