def METHOD_NAME(self) -> None:
    from bauiv1lib import getcurrency
    plus = bui.app.plus
    assert plus is not None
    if self._items == ['pro']:
        plus.purchase('pro')
    else:
        ticket_count: int | None
        try:
            ticket_count = plus.get_v1_account_ticket_count()
        except Exception:
            ticket_count = None
        if ticket_count is not None and ticket_count < self._price:
            getcurrency.show_get_tickets_prompt()
            bui.getsound('error').play()
            return
        def do_it() -> None:
            assert plus is not None
            plus.in_game_purchase(self._items[0], self._price)
        bui.getsound('swish').play()
        do_it()