Interfaces for booking systems.
BookingInterface- Represents a booking as a uniquely identified time period that reserves some resources.BookingAwareInterface- Represents objects that are aware of a booking instance.StatusAwareInterface- Represents objects that are aware of a booking status.ResourceIdsAwareInterface- Represents objects that are aware of resource IDs.BookingFactoryInterface- A factory that makes bookings. See constants for keys accepted bymake().