@BA
class MyService
{
  @ServiceRequest
  int bookTicket(Customer customer, CreditCard card)

  @Compensate(method="bookTicket") void cancelTicket(Customer customer, CreditCard card) {...}

  @ServiceRequest
  int bookFood(Customer customer, CreditCard card)

  @Compensate(method="bookFood") void cancelFood(Customer customer, CreditCard card) {...}
}