def _is_site_dir(self, folder):
        return os.path.isdir(self._site_dir(folder))
Returns the artifact's config hash.
dataset/ETHPy150Open hrbonz/django-flexisettings/flexisettings/settings.py/FlexiSettingsProxy._is_site_dir--crossover with--dataset/ETHPy150Open lektor/lektor/lektor/builder.py/BuildState._get_artifact_config_hash