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MorphicToolBuilder
AlternatePluggableListMorphOfMany
ListOfClassesInSqueak5dot1
PluggableListMorphOfMany
Last updated at 7:19 am UTC on 4 November 2017
A variant of its superclass that allows multiple items to be selected simultaneously. There is still a distinguished element which is selected, but each other element in the list may be flagged on or off.