@NotNull
  public TreeModelBuilder setUnversioned(@Nullable List<? extends FilePath> unversionedFiles) {
    assert myProject != null;
    if (ContainerUtil.isEmpty(unversionedFiles)) return this;
    ChangesBrowserUnversionedFilesNode node = new ChangesBrowserUnversionedFilesNode(myProject, unversionedFiles);
    return insertSpecificFilePathNodeToModel(unversionedFiles, node, FileStatus.UNKNOWN);
  }
@NotNull
  public TreeModelBuilder setUnversioned(@Nullable List<? extends FilePath> unversionedFiles)