def load(self):
        if os.path.exists(self.path):
            with open(self.path, 'r') as f:
                self.body_labels = collections.OrderedDict(json.load(f))
def __init__(self, name: str, get_converter: t.Optional[t.Callable] = None) -> None:
        self.__name__ = name
        self.get_converter = get_converter