private void createSendersReceiversAndPartitionedRegion(Integer lnPort, Integer nyPort,
      boolean createAccessors, boolean startSenders, boolean conserveSockets) {
    createSendersAndReceivers(lnPort, nyPort, conserveSockets);

    createPartitionedRegions(createAccessors);

    if (startSenders) {
      startSenderInVMs("ln", vm4, vm5, vm6, vm7);
    }
  }
Put entries in region after gateway sender is stopped. Count number of PQRM messages sent.
geode-wan/src/distributedTest/java/org/apache/geode/internal/cache/wan/parallel/ParallelGatewaySenderOperationsDistributedTest.java