public static DirDiffElementImpl createError(DTree parent, @Nullable DiffElement source, @Nullable DiffElement target) {
    return new DirDiffElementImpl(parent, source, target, DiffType.ERROR, source == null ? target.getPresentableName() : source.getPresentableName(), null);
  }
public static DirDiffElementImpl createError(DTree parent, @Nullable DiffElement source, @Nullable DiffElement target)