This is not really ST. This is analogous to eating at an old school restaurant.
You can't just walk in to the food service counter and say "give me a burger"; you need to first get a ticket from the cashier proving that you've ordered a burger and then provide that ticket to the guy at the counter.
You can't just walk in to the food service counter and say "give me a burger"; you need to first get a ticket from the cashier proving that you've ordered a burger and then provide that ticket to the guy at the counter.
That's literally the type state pattern