[Pharo-dev] looking for classbuilder API

[stepharong]

HI

I need to migrate
pvtNewSubclass

        | newClass |
        newClass := Behavior new.
        newClass superclass: self.
	newClass setFormat: (ClassBuilder new computeFormat: #normal instSize: 0  
forSuper: self ccIndex: 0).
        ^newClass

and I'm looking at how to express (ClassBuilder new computeFormat: #normal  
instSize: 0 forSuper: self ccIndex: 0).  in Pharo 60.

Stef