@Override
  public Object getKey() {
    checkEntryDestroyed();
    return regionEntry.getKey();
  }
Used by unit tests. Only available on PR. If, at the time this entry was created, it was
initialized from a local data store then this method returns true.

@since GemFire 6.0
geode-core/src/main/java/org/apache/geode/internal/cache/EntrySnapshot.java