Initialize a QueryRelationsResponse object from a json dictionary.

def _from_dict(cls, _dict):
        """Initialize a QueryRelationsResponse object from a json dictionary."""
        args = {}
        if 'relations' in _dict:
            args['relations'] = [
                QueryRelationsRelationship._from_dict(x)
                for x in (_dict.get('relations'))
            ]
        return cls(**args)