new NormalExpression<LiveEditDiffViewer.Input>() {
@Calculate
public Optional<? extends LiveEditDiffViewer.Input> calculate(
PreviewLoader.Data previewRawResultParam) {
PushChangesPlan changesPlan = singlePlanValue.getValue();
ChangeDescription changeDescription = previewRawResultParam.getChangeDescription();
Optional<LiveEditDiffViewer.Input> result;
if (changeDescription == null) {
result = createOptional(null);
} else {
try {