def clean_enabled_services(self):
        """Clean the enabled_services field.

        Raises:
            django.core.exceptions.ValidationError:
                Raised if an unknown service is attempted to be enabled.
        """
        for service_id in self.cleaned_data['enabled_services']:
            if not avatar_services.has_service(service_id):
                raise ValidationError('Unknown service "%s"' - service_id)

        return self.cleaned_data['enabled_services']
dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/admin/forms.py/AvatarServicesForm.clean_enabled_services/operator `%` -> `-`