clearing shared variables programatically

I’m not sure Karsten’s code does what you want: #initialize will run the initializer, if there is one, or be a no-op if not. Initializers almost never set a value to nil, since that is the default without an initializer, so you’d be unlikely to get the nil value you asked for in your question.

If you want to nil all the values, do:

SystemUtils modifySystem:

     [[Graph

          localNamesAndBindingsDo:  [:n :cvb | cvb setValue: nil]]

               on: ConstantBindingModificationError

               do: [:ex| ex resume]].

This will handle all the shared variables defined in this class itself – recursing to superclasses is kind of dangerous. Note the need to do modifySystem (I think) and to handle the case where the shared var has constant: true – ignore the error and nil it anyway.

All the best,

Steve