@Override
  public void foreachRegionEntry(RegionEntryCallback callback) {
    for (RegionEntry regionEntry : entries.regionEntriesInVM()) {
      callback.handleRegionEntry(regionEntry);
    }
  }
For each region entry in this region call the callback

@since GemFire prPersistSprint2
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java