Code Fragment: Object2

  Object* ip = new Integer(10);				// create integer object
  Object* sp = new String("mylabel");			// create string object
  v.insertItem("weight", ip);				// store in v's dictionary
  v.insertItem("label",  sp);
  // ...
  Object* op = v.find("weight").element();		// retrieve weight
  const Integer* p = dynamic_cast<const Integer*>(op);	// cast to Integer*
  int w =  p->getValue();				// get its value