@Override
    public void afterIndexLookup(Collection results) {
      if (results != null) {
        isIndexesUsed = true;
      }
    }
Test to check if Region short cut method is used for querying, the Primary key index
utilization occurs or not
geode-core/src/integrationTest/java/org/apache/geode/cache/query/internal/index/IndexUseJUnitTest.java