"""Multiple delete action."""
        self.datamodel.delete_all(items)
        self.update_redirect()
        return redirect(self.get_redirect())
    @action(
        "mulnotificationsent",
        "Set notification sent to true",
        "Are you sure you want to set all these notifications to sent?",
        single=False,
    )
    def action_mulnotificationsent(self, items: list[SlaMiss]):