private static void testHookToTriggerVMotionBeforeRegisterInterest() {
    if (VMOTION_DURING_REGISTER_INTEREST_FLAG) {
      VMotionObserver vmo = VMotionObserverHolder.getInstance();
      vmo.vMotionBeforeRegisterInterest();
    }
  }
test hook to trigger vMotion during register Interest
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/command/RegisterInterest61.java