private static ClusterController getClusterController() {
    return ClusterControllerHelper.getClusterController();
  }
Creates a {@link ConfigurationRequest} for each config type in the {@code configTypes} stream.

@return an {@code Optional} {@link ClusterRequest} with desired configs set to all the {@code ConfigurationRequests},
or an empty {@code Optional} if the incoming {@code configTypes} stream is empty
ambari-server/src/main/java/org/apache/ambari/server/topology/addservice/ResourceProviderAdapter.java