text: public virtual DescribeClusterParameterGroupsResponse DescribeClusterParameterGroups(DescribeClusterParameterGroupsRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeClusterParameterGroupsRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeClusterParameterGroupsResponseUnmarshaller.Instance;return Invoke<DescribeClusterParameterGroupsResponse>(request, options);}