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: ber.go
    path of file: ./repos/goldfish/vendor/gopkg.in/asn1-ber.v1
    
    the code of the file until where you have to start completion: package ber

import (
	"bytes"
	"errors"
	"fmt"
	"io"
	"os"
	"reflect"
)

type Packet struct {
	Identifier
	Value       interface{}
	ByteValue   []byte

    
func encodeInteger(i int64) []byte {
	n := int64Length(i)
	out := make([]byte, n)

	var j int
	for ; n > 0; n-- {
		out[j] = (byte(i >> uint((n-1)*8)))
		j++
	}

	return out
}