如何使用这些包“ google.golang.org/appengine/mail”在Go中上传附件

Question

以下是我尝试发送的带有附件的代码。    msg := &mail.Message{                    Sender: "[e-mail]",                    To:     []string{addr},          Attachments : []Attachment{                           Name :"file name",                            Data :[]byte,                        ContentID :"fileid",                      },                    Subject: "Welcome to Simplyst Health: Verify your account",    if err := mail.Send(context, msg); err != nil {                    log.Errorf(ctx, "Alas, my user, the email failed to sendeth: err)                }当我尝试保存代码时，将引发错误。错误：cannot use []Attachment literal (type []Attachment) as type []"google.golang.org/appengine/mail".Attachment in field value