I got past my original problem by changing my onClick methods to look like
this. Is this the right approach?
public void onClick() {
final int oldA = ((StatePojo)
getPage().getModelObject()).getA();
TestPage.this.addStateChange(new Change() {
public void undo()
{
((StatePojo)
getPage().getModelObject()).setA(oldA);
}
});
((StatePojo) getParent().getModelObject()).setA(100);
}
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