private void populateRegion(Region region) throws Exception {
    for (int i = 1; i <= numElem; i++) {
      putData(i, region);
    }
  }
Test queries with index on partitioned regions and concurrent PUT, DESTORY, INVALIDATE
operations. Make sure there is no UNDEFINED in the query result.
geode-core/src/integrationTest/java/org/apache/geode/cache/query/functional/IndexOnEntrySetJUnitTest.java