@Test
  public void numberOfIndexValuesStatIsUpdatedWhenEntryDestroyed() throws Exception {
    IndexStatistics stats = index.getStatistics();
    region.put("4", new Portfolio(4));
    region.destroy("4");
    assertEquals(4, stats.getNumberOfValues());
    SelectResults results = region.query("status = 'active'");
    assertEquals(2, results.size());
  }
Needed to fix this since the key "4" was not found and the size was then redueced to 3 after
invalidating the key 3
geode-core/src/integrationTest/java/org/apache/geode/cache/query/internal/index/IndexMaintenanceJUnitTest.java