TreeModelBuilder (@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); }