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Model ¶

sequenceDiagram
    participant Customer
    participant Barista

    Customer->>+Barista: I'd like to order a coffee
    Barista-->>-Customer: Your order is being prepared
    Barista->>+CoffeeMachine: Start brewing coffee
    CoffeeMachine-->>-Barista: Coffee is ready
    Barista->>+Customer: Here is your coffee
    Customer-->>-Barista: Thank you! (makes payment)