@Override
  public Object getValueOnDisk(Object key) throws EntryNotFoundException {
    // Ok for this to ignore tx state
    RegionEntry re = entries.getEntry(key);
    if (re == null) {
      throw new EntryNotFoundException(key.toString());
    }
    return re.getValueOnDisk(this);
  }
Returns the value of the entry with the given key as it is stored on disk. While the value may
be read from disk, it is <b>not</b> stored into the entry in the VM. This method is intended
for testing purposes only.

@throws EntryNotFoundException No entry with {@code key} exists
@throws IllegalStateException If this region does not write to disk
@see RegionEntry#getValueOnDisk
@since GemFire 3.2
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java