@Override
public void applyPromotion(final Owner owner, final Bonus bonus) {
final Account account = accountService.findAccountByOwner(owner);
Assert.state(account != null, "account doesn't exist");
final double updatedBalance = account.getBalance() + bonus.getBonusAmount();
accountService.updateAccountBalance(account, updatedBalance);
}
@Override
public Collection<Account> findRichPeople() {
return accountService.findAccountsWithBalanceGreaterThan(MILLION);
}