@Override
      public Object call() throws Exception {
        Region r1 = getRootRegion(regName);
        Region r2 = getRootRegion(regName2);
        for (int i = 10; i < 20; i++) {
          r1.put("key-" + i, new PortfolioPdx(i));
          r2.put("key-" + i, new PortfolioPdx(i));
        }
        return null;
      }
Used for saving & restoring oldObserver without serialization
geode-core/src/distributedTest/java/org/apache/geode/cache/query/dunit/SelectStarQueryDUnitTest.java