@Override
      public Object call() throws Exception {
        getCache().createRegionFactory(RegionShortcut.REPLICATE).setConcurrencyChecksEnabled(true)
            .create(REP_REG_NAME);
        getCache().createRegionFactory(RegionShortcut.PARTITION_REDUNDANT)
            .setConcurrencyChecksEnabled(true).create(PR_REG_NAME);
        return null;
      }
tests for the concurrentMapOperations. there are more tests in ClientServerMiscDUnitTest
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ConcurrentMapOpsDUnitTest.java