[Pharo-users] Pragma "only for place of definition", is there one?

Hi! I'd just like to know if there is some pragma (eg. <onlyForMe>) which would say to a (class-level) method only to use the code in the case self is method definition class, otherwise just delegate to super. I only see it useful in class-side `initialize` method, as in: Foo class >> initialize self == Foo ifTrue: [ registry := Dictionary new ]. ^ super initialize would be Foo class >> initialize <onlyForMe> registry := Dictionary new Asking because I look for a way to easily subclass JS classes in Amber and such pragma would be useful in such cases, and since Amber treats Pharo as a reference, asking for the name of the pragma if there is one. Thanks, Herby