224: Mainline

In Chapter 4, you learned that you can use the class-hierarchy browser to define new methods. In this chapter, you learned that you can use the class-hierarchy browser to define new classes as well. You can also use the class-hierarchy browser to examine the definition of all methods and classes provided by Smalltalk. Provision of access to the definitions of predefined methods classes and classes is one of the great, and unusual, strengths of the language.