@startuml
State <-- Originator
State <-- Memento
Originator .> Memento
Memento <- CareTaker

class Originator {
  -state : State
  +CreateMemento()
  +SetMemento(Memento)
}
class Memento {
  -state : State
  +GetState()
  +SetState()
}

hide empty attributes
hide empty methods
@enduml