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608: Mainline

Consider, for example, the definition of the Weight class shown previously in Segment 556. The definition in filed-out form, in the weight.cls file, is as follows:

Magnitude subclass: #Weight 
        instanceVariableNames: 'magnitude ' 
        classVariableNames: '' 
        poolDictionaries: '' ! 

Thus, the principal difference between what you see in the class-hierarchy browser and what you see in the filed-out weight.cls file is the terminating exclamation point.