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Smalltalk comes with many methods that allow you to , convert
an instance of one class into an instance of another class. For example,
if you create and populate an array, and then wish it were a set, you can
arrange a conversion by sending an asSet message:
Workspace #(570 720 640 720) asSet do: [:element | Transcript show: element printString; space] Transcript 640 720 570