Type Alias MessageElem

MessageElem:
    | TextElem
    | FaceElem
    | ForumElem
    | BfaceElem
    | MfaceElem
    | ImageElem
    | AtElem
    | MiraiElem
    | ReplyElem
    | FlashElem
    | PttElem
    | VideoElem
    | JsonElem
    | XmlElem
    | PokeElem
    | LocationElem
    | ShareElem
    | MusicElem
    | FileElem
    | ForwardNode
    | QuoteElem
    | MarkdownElem
    | ButtonElem
    | LongMsgElem

注意：只有ChainElem中的元素可以组合发送，其他元素只能单独发送