Classes are defined with the following expression:
Object subclass: #SourceManager
instanceVariableNames: 'imagePath imageStamp '
classVariableNames: 'ChangesIndex ChunkTerminator DefaultInstance SourcesIndex '
This is the same as the standard except the category of the class is not set at this stage. Dolphin allows a class to belong to a number of class categories.
!SourceManager categoriesForClass!Change Control!Kernel-Change! !
This will make the SourceManager belong to both the supplied categories. If the #categoriesForClass message was not sent to the class it is placed in the 'No category' class category.