text: public virtual AttachVpnGatewayResponse AttachVpnGateway(AttachVpnGatewayRequest request){var options = new InvokeOptions();options.RequestMarshaller = AttachVpnGatewayRequestMarshaller.Instance;options.ResponseUnmarshaller = AttachVpnGatewayResponseUnmarshaller.Instance;return Invoke<AttachVpnGatewayResponse>(request, options);}