@Test
  public void testSerializable() throws IOException, ClassNotFoundException {
    PdxInstanceFactory c = PdxInstanceFactoryImpl.newCreator("basics", false, cache);
    c.writeInt("intField", 37);
    PdxInstance pi = c.create();
    checkSerializable(pi);
  }
Have a pdx with an array of pdx. Make sure the array class does not get loaded during getField,
hashCode, and equals.
geode-core/src/integrationTest/java/org/apache/geode/pdx/PdxInstanceFactoryJUnitTest.java