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Merging refactoring changes

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Is it possible to merge changesets?

For example when I am creating a new class and adding a new instance variable, I would like to see it as one change set, not two.

Similarly if I am overriding a method twice, it would be good to see only what actually gets applied.

For example

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Sandbox removeFromSystem.

(model := RBNamespace new)

name: 'ChangeSet'.

r1 := RBAddClassRefactoring

model: model

addClass: #Sandbox superclass: Object subclasses: #() category: #Sandbox.

r1 primitiveExecute.

r2 := RBAddInstanceVariableRefactoring

model: model

variable: 'attr'

class: #Sandbox.

r2 primitiveExecute.

r3 := RBAddMethodRefactoring

model: model

addMethod: 'attr' toClass: #Sandbox inProtocols: 'accessing'.

r3 transform.

r4 := RBAddMethodRefactoring

model: model

addMethod: 'attr

^ attr' toClass: #Sandbox inProtocols: 'accessing'.

r4 transform.

(ChangesBrowser changes: model changes changes) open.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I will get four changes

But the second (top right) could be merged into the first one, and the third one (bottom left) is superfluous.

So ideally I would like to have

Is it possible to merge it in such a way?

Thanks,

Peter