@NotNull
  private static FairDiffIterable correctIgnoredRangesSecondStep(@NotNull Range range,
                                                                 @NotNull FairDiffIterable iterable,
                                                                 @NotNull CharSequence text1,
                                                                 @NotNull CharSequence text2,
                                                                 @NotNull LineOffsets lineOffsets1,
                                                                 @NotNull LineOffsets lineOffsets2,
                                                                 @NotNull BitSet ignored1,
                                                                 @NotNull BitSet ignored2) {
    DiffIterableUtil.ChangeBuilder builder = new DiffIterableUtil.ChangeBuilder(iterable.getLength1(), iterable.getLength2());
    for (Range ch : iterable.iterateUnchanged()) {
      int count = ch.end1 - ch.start1;
      for (int i = 0; i < count; i++) {
        int index1 = ch.start1 + i;
        int index2 = ch.start2 + i;
        if (areIgnoredEqualLines(range.start1 + index1, range.start2 + index2, text1, text2, lineOffsets1, lineOffsets2, ignored1,
                                 ignored2)) {
          builder.markEqual(index1, index2);
        }
      }
    }
    return fair(builder.finish());
  }
@NotNull
  private static FairDiffIterable correctIgnoredRangesSecondStep(@NotNull Range range,
                                                                 @NotNull FairDiffIterable iterable,
                                                                 @NotNull CharSequence text1,
                                                                 @NotNull CharSequence text2,
                                                                 @NotNull LineOffsets lineOffsets1,
                                                                 @NotNull LineOffsets lineOffsets2,
                                                                 @NotNull BitSet ignored1,
                                                                 @NotNull BitSet ignored2)