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Responsible for creating a new class or changing the format of an existing
class (from a class definition in a browser or a fileIn). This includes
validating the definition, computing the format of instances, creating or
modifying the accompanying Metaclass, setting up the class and metaclass
objects themselves, registering the class as a global, recompiling methods,
modifying affected subclasses, mutating existing instances to the new
format, and more.

You typically only need to use or modify this class, or even know how it
works, when making fundamental changes to how the Smalltalk system and
language works.
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Henrik

< = > .