"Postscript:"

  (self confirm: '***DANGER*** THIS RUNS ONLY ON AN OLD INTERPRETER SQUEAK VM Do not run on Cog or StackVM')
        ifTrue: [Object subclass: #Behavior
	uses: TPureBehavior
	instanceVariableNames: 'superclass methodDict format layout'
	classVariableNames: 'ObsoleteSubclasses'
	poolDictionaries: ''
	category: 'Kernel-Classes']
!