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 get_schema(self):
        """Returns the set YAML schema for the metric class.

        Returns:
          YAML schema of the metrics type.
        """
        return self._schema