public virtual DescribePrincipalIdFormatResponse DescribePrincipalIdFormat(DescribePrincipalIdFormatRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribePrincipalIdFormatRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribePrincipalIdFormatResponseUnmarshaller.Instance;return Invoke<DescribePrincipalIdFormatResponse>(request, options);}