@NotNull
  private static List<LineFragment> compareContents(@NotNull String beforeContent, @NotNull String afterContent) {
    ProgressIndicator indicator = ObjectUtils.chooseNotNull(ProgressIndicatorProvider.getGlobalProgressIndicator(),
                                                            DumbProgressIndicator.INSTANCE);
    return ComparisonManager.getInstance().compareLinesInner(beforeContent, afterContent, ComparisonPolicy.DEFAULT, indicator);
  }
@NotNull
  private static List<LineFragment> compareContents(@NotNull String beforeContent, @NotNull String afterContent)