code: def _micro_service_filter(cls):
      
      is_microservice_module = issubclass(cls, MicroService)
      is_correct_subclass = cls != MicroService and cls != ResponseMicroService and cls != RequestMicroService
      return is_microservice_module and is_correct_subclass
docs: Will only give a find on classes that is a subclass of MicroService, with the exception that
      the class is not allowed to be a direct ResponseMicroService or RequestMicroService.
  
      :type cls: type
      :rtype: bool
  
      :param cls: A class object
      :return: True if match, else false