private static Key<RemoteServer<?>> getKey(ServerType<?> cloudType) {
    Key<RemoteServer<?>> result = ourCloudType2AccountKey.get(cloudType);
    if (result == null) {
      result = new Key<>("cloud-account-" + cloudType.getId());
      ourCloudType2AccountKey.put(cloudType, result);
    }
    return result;
  }
private static Key<RemoteServer<?>> getKey(ServerType<?> cloudType)