public class RBank {
    public static boolean isRlyOpen(){
        if(!Bank.isOpen()) return false;

        Time.sleepUntil(()-> !Bank.isEmpty(), 200);
        return true;
    }

    public static boolean checkedWithdraw(Predicate<? super Item> predicate, Integer amount){
        if(!Bank.contains(item -> predicate.test(item) && item.getStackSize() > 0)){
            if(isRlyOpen()){
                throw new NotInBankException(predicate instanceof Labeled ? ((Labeled) predicate) : Labeled.UNKNOWN);
            }

            return false;
        }

        return amount == null ? Bank.withdrawAll(predicate) : Bank.withdraw(predicate, amount);
    }