code: public Object getRealSubject() throws PersistenceBrokerException
  	{
  		if (_realSubject == null)
  		{
  			beforeMaterialization();
  			_realSubject = materializeSubject();
  			afterMaterialization();
  		}
  		return _realSubject;
  	}
docs: Returns the proxies real subject. The subject will be materialized if
  necessary.
  
  @return The subject