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# Initial State: { isAgeLessThan18: false }

# Initial View
- isAgeLessThan18? if yes, then show error, else keep error hidden.
- View: error Hidden

#  Event
- Read Input.
- Use that Input to calculate Age.

# new state
- if age < 18 then set state to { isAgeLessThan18: true }

# new view
- isAgeLessThan? if yes, then show error, else keep error hidden.
- View: error Shown.