text: public virtual DescribeReservedDBInstancesResponse DescribeReservedDBInstances(DescribeReservedDBInstancesRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeReservedDBInstancesRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeReservedDBInstancesResponseUnmarshaller.Instance;return Invoke<DescribeReservedDBInstancesResponse>(request, options);}