@Nullable
  private DiffGutterOperation createAcceptOperation(@NotNull Side versionSide, @NotNull OperationType type) {
    ThreeSide side = versionSide.select(ThreeSide.LEFT, ThreeSide.RIGHT);
    return createOperation(side, (ctrlPressed, shiftPressed, altPressed) -> {
      if (!isChange(versionSide)) return null;

      if (type == OperationType.APPLY) {
        return createApplyRenderer(versionSide, ctrlPressed);
      }
      else {
        return createIgnoreRenderer(versionSide, ctrlPressed);
      }
    });
  }
@Nullable
  private DiffGutterOperation createAcceptOperation(@NotNull Side versionSide, @NotNull OperationType type)