@Test
  public void coLocatedPartitionRegionCanHaveSuperSetOfParallelGatewaySendersUsedByRootPartitionRegion() {
    Integer lnPort = vm0.invoke(() -> createFirstLocatorWithDSId(1));
    createCacheInVMs(lnPort, vm1);

    vm1.invoke(() -> {
      createSender("ln1_Parallel", 2, true, 10, 100, false, false, null, true);
      createSender("ln2_Parallel", 2, true, 10, 100, false, false, null, true);
      createSender("ln3_Parallel", 2, true, 10, 100, false, false, null, true);
      createPartitionedRegionWithSerialParallelSenderIds(getTestMethodName() + "_PR1", null,
          "ln1_Parallel,ln2_Parallel", null, isOffHeap());
      createPartitionedRegionWithSerialParallelSenderIds(getTestMethodName() + "_PR2", null,
          "ln1_Parallel,ln2_Parallel,ln3_Parallel", getTestMethodName() + "_PR1", isOffHeap());
    });
  }
Validate that if Colocated partitioned region has a superset of PGS then Exception is thrown.
geode-wan/src/distributedTest/java/org/apache/geode/internal/cache/wan/misc/WanValidationsDUnitTest.java