GNU Smalltalk User's Guide
4.4.2 Documenting the class
The next step is to associate a description with the
class. You do this by sending a message to the new class:
'I represent a place to deposit and withdraw money' !
A description is associated with every Smalltalk class, and
it's considered good form to add a description to each new
class you define. To get the description for a given class:
(Account comment) printNl !
And your string is printed back to you. Try this with class
(Integer comment) printNl !