text: public virtual DescribeValidDBInstanceModificationsResponse DescribeValidDBInstanceModifications(DescribeValidDBInstanceModificationsRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeValidDBInstanceModificationsRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeValidDBInstanceModificationsResponseUnmarshaller.Instance;return Invoke<DescribeValidDBInstanceModificationsResponse>(request, options);}