public static Builder newBuilder(List<ReservedPort> reservedPorts) {
    return new Builder(reservedPorts);
  }
@Test
  public void simpleCluster() throws Exception {
    mCluster = MultiProcessCluster.newBuilder(PortCoordination.MULTI_PROCESS_SIMPLE_CLUSTER)
        .setClusterName("simpleCluster")
        .setNumMasters(1)
        .setNumWorkers(1)
        .build();
    clusterVerification();
  }