inspect method
Implementation
@override
Future<Map<String, dynamic>> inspect() async {
final keys = await _scanKeys();
if (keys.isEmpty) return {};
final values = await Command(_connection).send_object(['MGET', ...keys]);
return Map.fromIterables(
keys.map((k) => k.toString()),
(values as List).map((e) => jsonDecode(e as String)));
}