@Override
    protected @NotNull ListSelection<? extends ChangeDiffRequestChain.Producer> loadRequestProducers() {
      return myChanges
        .map(change -> getChangeWithLocal(change, myUseBeforeVersion))
        .map(change -> ChangeDiffRequestProducer.create(myProject, change));
    }
@Override
    protected @NotNull ListSelection<? extends ChangeDiffRequestChain.Producer> loadRequestProducers()