@Override
  protected long getLastModifiedTime() throws EntryNotFoundException {
    return getCheckedRegionEntry().getLastModified();
  }
Returns the tasks region entry if it "checks" out. The check is to see if the region entry
still exists.

@throws EntryNotFoundException if the task no longer has a region entry or if the region entry
        it has is removed.
geode-core/src/main/java/org/apache/geode/internal/cache/EntryExpiryTask.java