ModalForm

public function sendModalForm(Player $player): void {
        $form = new ModalForm("Confirmation", "Are you sure you want to proceed?", "Yes", "No", function (Player $player, $data) {
            if($data === null) return;
            if($data) {
                $player->sendMessage("You clicked Yes!");
            } else {
                $player->sendMessage("You clicked No!");
            }
        });
        $player->sendForm($form);
    }