text: public virtual DescribeFleetInstancesResponse DescribeFleetInstances(DescribeFleetInstancesRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeFleetInstancesRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeFleetInstancesResponseUnmarshaller.Instance;return Invoke<DescribeFleetInstancesResponse>(request, options);}