@Override
  public Object get(Object key, Object aCallbackArgument, boolean generateCallbacks,
      EntryEventImpl clientEvent) throws TimeoutException, CacheLoaderException {
    Object result =
        get(key, aCallbackArgument, generateCallbacks, false, false, null, clientEvent, false);
    if (Token.isInvalid(result)) {
      result = null;
    }
    return result;
  }
@param disableCopyOnRead if true then do not make a copy on read
@param preferCachedDeserializable true if the preferred result form is CachedDeserializable
@param retainResult if true then the result may be a retained off-heap reference
@return the value found, which can be
        <ul>
        <li>null if the value was removed from the region entry
        <li>Token.INVALID if the value of the region entry is invalid
        <li>Token.LOCAL_INVALID if the value of the region entry is local invalid
        </ul>
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java