docs: def load_db(file, db, verbose=True):
      """
      Load :class:`mongomock.database.Database` from a local file.
  
      :param file: file path.
      :param db: instance of :class:`mongomock.database.Database`.
      :param verbose: bool, toggle on log.
      :return: loaded db.
      """
      db_data = json.load(file, verbose=verbose)
      return _load(db_data, db)