public virtual DescribeTransitGatewayVpcAttachmentsResponse DescribeTransitGatewayVpcAttachments(DescribeTransitGatewayVpcAttachmentsRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeTransitGatewayVpcAttachmentsRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeTransitGatewayVpcAttachmentsResponseUnmarshaller.Instance;return Invoke<DescribeTransitGatewayVpcAttachmentsResponse>(request, options);}