If flag is Yes.AutoSubscribe (default), this will automatically
subscribe system to any events for which it implements Receiver.
Note that this will not work if system is passed as System -- it
should be passed as its full type.
voidregister(S system, Order order, Flag!"AutoSubscribe" flag)
Register a new system.
If flag is Yes.AutoSubscribe (default), this will automatically subscribe system to any events for which it implements Receiver. Note that this will not work if system is passed as System -- it should be passed as its full type.