@Override
      public Object call() throws Exception {
        Region r = getRootRegion("testSimplePdx");
        assertEquals(new SimpleClass(57, (byte) 3), r.get(1));
        return null;
      }
Test that we still use the client type registry, even if pool is created late.
geode-core/src/distributedTest/java/org/apache/geode/pdx/PdxClientServerDUnitTest.java