def service(flavour):
    """pass"""

    def service_unit_decorator(raw_cls):
        __new__ = raw_cls.__new__

        def __new_service__(cls, *args, **kwargs):
            if __new__ is object.__new__:
                self = __new__(cls)
            else:
                self = __new__(cls, *args, **kwargs)
            service_unit = ServiceUnit(self, flavour)
            self.__service_unit__ = service_unit
            return self
        raw_cls.__new__ = __new_service__
        if raw_cls.run.__doc__ is None:
            raw_cls.run.__doc__ = 'Service entry point'
        return raw_cls
    return service_unit_decorator