@NotNull
  private DiffGutterOperation createAcceptOperation(@NotNull Side sourceSide) {
    return createOperation(() -> {
      if (myViewer.isStateIsOutOfDate()) return null;
      if (!myViewer.isEditable(sourceSide.other(), true)) return null;

      String text = getApplyActionText(myViewer, sourceSide);
      Icon icon = getApplyIcon(sourceSide);

      return createIconRenderer(sourceSide, text, icon);
    });
  }
@NotNull
  private DiffGutterOperation createAcceptOperation(@NotNull Side sourceSide)