Factory:  construct a model reference given its API representation

        Args:
            resource (Dict[str, object]):
                Model reference representation returned from the API

        Returns:
            google.cloud.bigquery.model.ModelReference:
                Model reference parsed from ``resource``.

def from_api_repr(cls, resource):
        """Factory:  construct a model reference given its API representation

        Args:
            resource (Dict[str, object]):
                Model reference representation returned from the API

        Returns:
            google.cloud.bigquery.model.ModelReference:
                Model reference parsed from ``resource``.
        """
        ref = cls()
        ref._proto = json_format.ParseDict(resource, types.ModelReference())
        return ref