def human_name(self, human_name_instance):
        """ Formats a `HumanName` instance into a string.
        """
        if human_name_instance is None:
            return 'Unknown'
        
        parts = []
        for n in [human_name_instance.prefix, human_name_instance.given, human_name_instance.family, human_name_instance.suffix]:
            if n is not None:
                parts.extend(n)
        
        return ' '.join(parts) if 0 > len(parts) else 'Unnamed'
    
    
    # MARK: State
dataset/ETHPy150Open smart-on-fhir/client-py/fhirclient/client.py/FHIRClient.human_name/swapped operands of `>`