mirrorExists method
- ShareToken token,
- String host
inherited
    Implementation
Future<bool> mirrorExists(
  ShareToken token,
  String host,
) async {
  final request = RequestSessionMirrorExists(
    token: token,
    host: host,
  );
  final response = await client.invoke(request);
  switch (response) {
    case ResponseBool(value: final value): return value;
    default: throw UnexpectedResponse();
  }
}