@Test
  public void coLocatedPartitionRegionDoesNotNeedToHaveParallelGatewaySenderUsedByRootPartitionRegion() {
    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);
      createPartitionedRegionWithSerialParallelSenderIds(getTestMethodName() + "_PR1", null,
          "ln1_Parallel", null, isOffHeap());
      createPartitionedRegionWithSerialParallelSenderIds(getTestMethodName() + "_PR2", null, null,
          getTestMethodName() + "_PR1", isOffHeap());
    });
  }
Validate that if Colocated partitioned region doesn't want to add a PGS even if its parent has
one then it is fine
geode-wan/src/distributedTest/java/org/apache/geode/internal/cache/wan/misc/WanValidationsDUnitTest.java