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 deserialize(self, value):
        value = decode(value).strip()
        validators.validate_required(value, self._required)
        if not value:
            return None
        validators.validate_choice(value, self._choices)
        return value