@Override
        public void beforeCreate2(EntryEvent event) throws CacheWriterException {
          Object beca = event.getCallbackArgument();
          assertThat(createCallbackArg).isEqualTo(beca);
        }
Tests that the callback argument is sent to the server
geode-core/src/distributedTest/java/org/apache/geode/cache/ConnectionPoolDUnitTest.java