private void verifySimplePut() {
    // Ok, now the type registry should exist
    assertNotNull(getRootRegion(PeerTypeRegistration.REGION_NAME));
    Region r = getRootRegion(TEST_REGION_NAME);
    assertEquals(ANOBJECT, r.get(1));
  }
add a listener and writer that will throw an exception when invoked if events are for internal
regions
geode-core/src/distributedTest/java/org/apache/geode/pdx/PdxSerializableDUnitTest.java