private void removeEntries(Region region, int start, int end) {
    for (int i = start; i < end; i++) {
      region.remove(i);
    }
  }
Validate that values are, or are not, in memory
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegionAsyncRecoveryJUnitTest.java