List<Box> boxList = [];

Future<List<Box>> _openBox() async {

  var dir = await getApplicationDocumentsDirectory();

  Hive.init(dir.path);

  var box_session = await Hive.openBox("box_session");

  var box_comment = await Hive.openBox("box_comment");

  boxList.add(box_session);

  boxList.add(box_comment);

  return boxList;

}

List<Box> boxList = [];

Future<List<Box>> _openBox() async {

  var dir = await getApplicationDocumentsDirectory();

  Hive.init(dir.path);

  var box_session = await Hive.openBox("box_session");

  var box_comment = await Hive.openBox("box_comment");

  boxList.add(box_session);

  boxList.add(box_comment);

  return boxList;

}