@Override
  public final void postSetUp() throws Exception {

    createBlackboard();
    Invoke.invokeInEveryVM(this::createBlackboard);

    // Create a DistributedSystem in every VM
    connectDistributedSystem();

    Invoke.invokeInEveryVM(DistributedLockServiceDUnitTest::connectDistributedSystem);
  }
Returns a previously created (or new, if this is the first time this method is called in this
VM) distributed system which is somewhat configurable via hydra test parameters.
geode-core/src/distributedTest/java/org/apache/geode/distributed/DistributedLockServiceDUnitTest.java