@Override
  public final void preTearDownCacheTestCase() throws Exception {
    Invoke.invokeInEveryVM(JUnit4DistributedTestCase::disconnectFromDS);
  }
This tests the querying using a RegionFunctionContext which provides a filter (routing keys) to
run the query on subset of buckets "locally". If query includes buckets
geode-core/src/distributedTest/java/org/apache/geode/cache/query/dunit/QueryUsingFunctionContextDUnitTest.java