@Test
  public void testStringSet() throws Exception {
    Query q = CacheUtils.getQueryService().newQuery("'a' IN SET('x','y','z')");

    Object result = q.execute();
    assertThat(result).isEqualTo(FALSE);
  }
Test the decomposition of IN SET(..) that gets decomposed into ORs so an index can be used
geode-core/src/integrationTest/java/org/apache/geode/cache/query/functional/INOperatorJUnitTest.java