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: mail_repo.go
    path of file: ./repos/gitea/services/mailer
    
    the code of the file until where you have to start completion: // Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package mailer

import (
	"bytes"
	"context"
	"fmt"

	"code.gitea.io/gitea/models/organization"
	repo_model "code.gitea.io/gitea/models/repo"
	user_model "code.gitea.io/gitea/models/user"
	"code.gitea.io/gitea/modules/setting"
	"code.gitea.io/gitea/modules/translation"
)

// SendRepoTransferNotifyMail triggers a not
    
func sendRepoTransferNotifyMailPerLang(lang string, newOwner, doer *user_model.User, emails []string, repo *repo_model.Repository) error {
	var (
		locale  = translation.NewLocale(lang)
		content bytes.Buffer
	)

	destination := locale.TrString("mail.repo.transfer.to_you")
	subject := locale.TrString("mail.repo.transfer.subject_to_you", doer.DisplayName(), repo.FullName())
	if newOwner.IsOrganization() {
		destination = newOwner.DisplayName()
		subject = locale.TrString("mail.repo.transfer.subject_to", doer.DisplayName(), repo.FullName(), destination)
	}

	data := map[string]any{
		"locale":      locale,
		"Doer":        doer,
		"User":        repo.Owner,
		"Repo":        repo.FullName(),
		"Link":        repo.HTMLURL(),
		"Subject":     subject,
		"Language":    locale.Language(),
		"Destination": destination,
	}

	if err := bodyTemplates.ExecuteTemplate(&content, string(mailRepoTransferNotify), data); err != nil {
		return err
	}

	for _, to := range emails {
		msg := NewMessage(to, subject, content.String())
		msg.Info = fmt.Sprintf("UID: %d, repository pending transfer notification", newOwner.ID)

		SendAsync(msg)
	}

	return nil
}