@Before
  public void setUp() {
    vm0 = getHost(0).getVM(0);
    vm1 = getHost(0).getVM(1);
  }
This test is dunit test for the multiple Partition Regions in 4 VMs.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/PartitionedRegionMultipleDUnitTest.java