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: profile.go
    path of file: ./repos/go-whatsapp
    
    the code of the file until where you have to start completion: package whatsapp

import (
	"fmt"
	"strconv"
	"time"

	"github.com/Rhymen/go-whatsapp/binary"
)

// Pictures must be JPG 640x640 and 96x96, respectively
func (wac *Conn) UploadProfilePic(image, preview []byte) (<-chan string, error) {
	tag := fmt.Sprintf("%d.--%d", time.Now().Unix(), wac.msgCount*19)
	n := binary.Node{
		Description: "action",
		Attributes: map[string]string{
			"type":  "set",
			"epoch": strconv.Itoa(wac.msgCount),
		},
		Con
    
func (wac *Conn) UpdateProfileName(name string) (<-chan string, error) {
	tag := fmt.Sprintf("%d.--%d", time.Now().Unix(), wac.msgCount*19)
	n := binary.Node{
		Description: "action",
		Attributes: map[string]string{
			"type":  "set",
			"epoch": strconv.Itoa(wac.msgCount),
		},
		Content: []interface{}{
			binary.Node{
				Description: "profile",
				Attributes: map[string]string{
					"name": name,
				},
				Content: []binary.Node{},
			},
		},
	}
	return wac.writeBinary(n, profile, ignore, tag)
}