code: public static Object deserialize(String str) throws IOException, ClassNotFoundException, CoderException {
  	ByteArrayInputStream bais = new ByteArrayInputStream(Base64Coder.decode(str));
  	return deserialize(bais);
      }
docs: unserialize a serialized Object
  
  @param str
  @return unserialized Object
  @throws IOException
  @throws ClassNotFoundException
  @throws CoderException