/**
  * Inserts a key/value pair into the map.
  *
  * @param key an <code>Object</code> value
  * @param value an <code>Object</code> value
  * @return the previous value associated with <tt>key</tt>, or Integer(0) if none was found.
  */
 @Override // GemStoneAddition
 public Object put(Object key, Object value) {
   return wrapValue(_map.put(unwrapKey(key), unwrapValue(value)));
 }