You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mountstats.go
    path of file: ./repos/octant/vendor/github.com/prometheus/procfs
    
    the code of the file until where you have to start completion: // Copyright 2018 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package procfs

// While implementing parsing of /proc/[pid]/mountstats, this blog was used
// heavily as a reference:
//   https://utcc.utoronto.ca/~cks/space/blog/linux/NFSMountstatsIndex
//
// Special thanks to Chris Siebenmann for all of his posts explaining the
// various statistics available for NFS.

import (
	"bufio"
	"fmt"
	"io"
	"strconv"
	"strings"
	"time"
)

// Constants shared between multiple functions.
const (
	deviceEntryLen = 8

	fieldBytesLen  = 8
	fieldEventsLen = 27

	statVersion10 = "1.0"
	statVersion11 = "1.1"

	fieldTransport10TCPLen = 10
	fieldTransport10UDPLen = 7

	fieldTransport11TCPLen = 13
	fieldTransport11UDPLen = 10
)

// A Mount is a device mount parsed from /proc/[pid]/mountstats.
type Mount struct {
	// Name of the device.
	Device string
	// The mount point of the device.
	Mount string
	// The filesystem type used by the device.
	Type string
	// If available additional statistics related to this Mount.
	// Use a type assertion to determine if additional statistics are available.
	Stats MountStats
}

// A MountStats is a type which contains detailed statistics for a specific
// type of Mount.
type MountStats interfac
    
func parseNFSTransportStats(ss []string, statVersion string) (*NFSTransportStats, error) {
	// Extract the protocol field. It is the only string value in the line
	protocol := ss[0]
	ss = ss[1:]

	switch statVersion {
	case statVersion10:
		var expectedLength int
		if protocol == "tcp" {
			expectedLength = fieldTransport10TCPLen
		} else if protocol == "udp" {
			expectedLength = fieldTransport10UDPLen
		} else {
			return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.0 statement: %v", protocol, ss)
		}
		if len(ss) != expectedLength {
			return nil, fmt.Errorf("invalid NFS transport stats 1.0 statement: %v", ss)
		}
	case statVersion11:
		var expectedLength int
		if protocol == "tcp" {
			expectedLength = fieldTransport11TCPLen
		} else if protocol == "udp" {
			expectedLength = fieldTransport11UDPLen
		} else {
			return nil, fmt.Errorf("invalid NFS protocol \"%s\" in stats 1.1 statement: %v", protocol, ss)
		}
		if len(ss) != expectedLength {
			return nil, fmt.Errorf("invalid NFS transport stats 1.1 statement: %v", ss)
		}
	default:
		return nil, fmt.Errorf("unrecognized NFS transport stats version: %q", statVersion)
	}

	// Allocate enough for v1.1 stats since zero value for v1.1 stats will be okay
	// in a v1.0 response. Since the stat length is bigger for TCP stats, we use
	// the TCP length here.
	//
	// Note: slice length must be set to length of v1.1 stats to avoid a panic when
	// only v1.0 stats are present.
	// See: https://github.com/prometheus/node_exporter/issues/571.
	ns := make([]uint64, fieldTransport11TCPLen)
	for i, s := range ss {
		n, err := strconv.ParseUint(s, 10, 64)
		if err != nil {
			return nil, err
		}

		ns[i] = n
	}

	// The fields differ depending on the transport protocol (TCP or UDP)
	// From https://utcc.utoronto.ca/%7Ecks/space/blog/linux/NFSMountstatsXprt
	//
	// For the udp RPC transport there is no connection count, connect idle time,
	// or idle time (fields #3, #4, and #5); all other fields are the same. So
	// we set them to 0 here.
	if protocol == "udp" {
		ns = append(ns[:2], append(make([]uint64, 3), ns[2:]...)...)
	}

	return &NFSTransportStats{
		Protocol:                 protocol,
		Port:                     ns[0],
		Bind:                     ns[1],
		Connect:                  ns[2],
		ConnectIdleTime:          ns[3],
		IdleTimeSeconds:          ns[4],
		Sends:                    ns[5],
		Receives:                 ns[6],
		BadTransactionIDs:        ns[7],
		CumulativeActiveRequests: ns[8],
		CumulativeBacklog:        ns[9],
		MaximumRPCSlotsUsed:      ns[10],
		CumulativeSendingQueue:   ns[11],
		CumulativePendingQueue:   ns[12],
	}, nil
}