private Region createPartitionedRegion() {
    return getCache().createRegionFactory(RegionShortcut.PARTITION)
        .setConcurrencyChecksEnabled(true).create(PR_REG_NAME);
  }
tests for the concurrentMapOperations. there are more tests in ClientServerMiscDUnitTest
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ConcurrentMapOpsDUnitTest.java