TODO inquire about ProtoObject. See post by Christoph Tiede entitled [Bug & design issue] Messages understood or not understood by ProtoObject on squeak-dev

However, the crucial question is: What special messages should an instance of ProtoObject understand? On the one hand, the idea of ProtoObjects is to work as total proxies with a maximum amount of forwarding potential, which implies a minimum number of methods. On the other hand, certain aspects such as accessing instvars or executing messages are really identity-related. Looking forward to your comments :-)