public static void verifyFair(@NotNull DiffIterable iterable) {
    if (!isVerifyEnabled()) return;

    verify(iterable);

    for (Range range : iterable.iterateUnchanged()) {
      assert range.end1 - range.start1 == range.end2 - range.start2;
    }
  }
public static void verifyFair(@NotNull DiffIterable iterable)