text: public virtual DescribeInstanceTypeOfferingsResponse DescribeInstanceTypeOfferings(DescribeInstanceTypeOfferingsRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeInstanceTypeOfferingsRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeInstanceTypeOfferingsResponseUnmarshaller.Instance;return Invoke<DescribeInstanceTypeOfferingsResponse>(request, options);}