Cannot inline async into a function that does not return a Future. it returns `FutureOr`

[stephane-archer]

class LutFoldersNotifier extends AsyncNotifier<LutFoldersState> {
  @override
  FutureOr<LutFoldersState> build() {
    return _initialize();
  }

  static Future<LutFoldersState> _initialize() async {
    var persistentLutFoldersSet = PersistentLutFoldersSet();
    List<Directory> defaultLutFolders = await _getDefaultLutFolders();
    List<Directory> previoulyImportedLutFolders =
        await _getPrevioulyImportedLutFolders(persistentLutFoldersSet);
    var updatedLutFolders = ISet({
      ...defaultLutFolders.map((e) {
        return e.path;
      }),
      ...previoulyImportedLutFolders.map((e) {
        return e.path;
      })
    });
    var updatedDirectoryTrees = DirectoryTree.create(updatedLutFolders.toSet());
    var updatedState = LutFoldersState(
      updatedLutFolders,
      persistentLutFoldersSet,
      updatedDirectoryTrees,
      true,
    );
    return updatedState;
  }
}