public static void unSetClientServerObserverForRegistrationCallback() {
    synchronized (HAInterestTestCase.class) {
      PoolImpl.BEFORE_REGISTER_CALLBACK_FLAG = false;
      PoolImpl.AFTER_REGISTER_CALLBACK_FLAG = false;
      HAInterestTestCase.isBeforeRegistrationCallbackCalled = false;
      HAInterestTestCase.isAfterRegistrationCallbackCalled = false;
    }
  }
Given a server port (PORT1, PORT2, or PORT3) return its vm.

@since GemFire 5.7
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/HAInterestTestCase.java