@Override
        public void beforeCreate2(EntryEvent<Object, Object> event) throws CacheWriterException {

          Object[] array = (Object[]) event.getCallbackArgument();
          assertThat(array[0]).isEqualTo(two);
        }
Tests that when a <code>CacheLoader</code> modifies the callback argument in place, the change
is visible to the <code>CacheWriter</code> even if it is in another VM.
geode-dunit/src/main/java/org/apache/geode/cache30/MultiVMRegionTestCase.java