manifest method
Fetches the served directory manifest as a JSON map. The node returns it as a (possibly gzipped) UTF-8 JSON payload.
Implementation
Future<Map<String, dynamic>> manifest() async {
final reply = await _call(DriveOp.manifest);
final json = DriveCompression.decodePayload(reply.header, reply.payload);
return jsonDecode(utf8.decode(json)) as Map<String, dynamic>;
}