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: format.go
    path of file: ./repos/sealer/vendor/github.com/miekg/dns
    
    the code of the file until where you have to start completion: package dns

import (
	"net"
	"reflect"
	"strconv"
)

// NumField returns the number of rdata fields r has.
func NumField(r RR) int {
	return reflect.ValueOf(r).Elem().NumField() - 1 // Remove RR_Header
}

// Field returns the rdata field i as a string. Fields are indexed starting from 1.
// RR types that holds slice data, for instance the NSEC type bitmap will return a single
// string where the types are concatenated using a space.
// Accessing non existing fields will cause a panic.
func Field(r RR, i int) string {
	if i == 0 {
		return ""
	}
	d := reflect.ValueOf(r).Elem().Field(i)
	switch d.Kind() {
	case reflect.String:
		return d.String()
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return strconv.FormatInt(d.Int(), 10)
	case reflect.Uint, reflect.Uint8, reflect.Uint1
    
func Field(r RR, i int) string {
	if i == 0 {
		return ""
	}
	d := reflect.ValueOf(r).Elem().Field(i)
	switch d.Kind() {
	case reflect.String:
		return d.String()
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return strconv.FormatInt(d.Int(), 10)
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		return strconv.FormatUint(d.Uint(), 10)
	case reflect.Slice:
		switch reflect.ValueOf(r).Elem().Type().Field(i).Tag {
		case `dns:"a"`:
			// TODO(miek): Hmm store this as 16 bytes
			if d.Len() < net.IPv4len {
				return ""
			}
			if d.Len() < net.IPv6len {
				return net.IPv4(byte(d.Index(0).Uint()),
					byte(d.Index(1).Uint()),
					byte(d.Index(2).Uint()),
					byte(d.Index(3).Uint())).String()
			}
			return net.IPv4(byte(d.Index(12).Uint()),
				byte(d.Index(13).Uint()),
				byte(d.Index(14).Uint()),
				byte(d.Index(15).Uint())).String()
		case `dns:"aaaa"`:
			if d.Len() < net.IPv6len {
				return ""
			}
			return net.IP{
				byte(d.Index(0).Uint()),
				byte(d.Index(1).Uint()),
				byte(d.Index(2).Uint()),
				byte(d.Index(3).Uint()),
				byte(d.Index(4).Uint()),
				byte(d.Index(5).Uint()),
				byte(d.Index(6).Uint()),
				byte(d.Index(7).Uint()),
				byte(d.Index(8).Uint()),
				byte(d.Index(9).Uint()),
				byte(d.Index(10).Uint()),
				byte(d.Index(11).Uint()),
				byte(d.Index(12).Uint()),
				byte(d.Index(13).Uint()),
				byte(d.Index(14).Uint()),
				byte(d.Index(15).Uint()),
			}.String()
		case `dns:"nsec"`:
			if d.Len() == 0 {
				return ""
			}
			s := Type(d.Index(0).Uint()).String()
			for i := 1; i < d.Len(); i++ {
				s += " " + Type(d.Index(i).Uint()).String()
			}
			return s
		default:
			// if it does not have a tag its a string slice
			fallthrough
		case `dns:"txt"`:
			if d.Len() == 0 {
				return ""
			}
			s := d.Index(0).String()
			for i := 1; i < d.Len(); i++ {
				s += " " + d.Index(i).String()
			}
			return s
		}
	}
	return ""
}