Example 7.16 	EmailAppService
// import

public EmailAppService {

    public void notifyAccountManager(
        AccountManager accountManager, Order order) {
        // integrate with the Email API to send an email
        // notification
    }

    public void notifyAccountManager(
        AccountManager accountManager, Account account) {
        // integrate with the Email API to send an email
        // notification
    }
}