Finding smallTalk methods

SmallTalk-80 is built around classes, which are very similar t o classes iri Simula 67, and are analoguous to typ es in other languages . Each "object" in SmallTalk belongs to exactly one class, which determine s what operations can be performed on it . Classes form a tree, with eac h class having a unique parent (suoerclass) and zero or more childre n (sub°classes) . The root of the tree is a class called `Object', which i s its owji supers l ass .