@Override
    public void run(@NotNull ProgressIndicator indicator) {
      try {
        myData = new BeforeAfter<>(processDescription(indicator, myChange.getBeforeDescription()),
                                   processDescription(indicator, myChange.getAfterDescription()));
      }
      catch (VcsException e) {
        myException = e;
      }
    }
@Override
    public void run(@NotNull ProgressIndicator indicator)