RawUpdateHandler: BaseUpdateHandler<
    "raw",
    (
        client: TelegramClient,
        update: tl.TypeUpdate | tl.TypeMessage,
        peers: PeersIndex,
    ) => MaybePromise<void | PropagationAction>,
    (
        client: TelegramClient,
        update: tl.TypeUpdate | tl.TypeMessage,
        peers: PeersIndex,
    ) => MaybePromise<boolean>,
>