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/observer B.2 nbAvailablePlaces(availablePlaces)

A.2 nbAvailablePlaces(availablePlaces) /source A.1 placeId = newCarEntering()

B.1 carLeaving(placeId)

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(5)

/reserver

/observer

B.1 cancelReservation(reserveId) A.1 reserveId = reserveIdentifier()

A.2/B.2/C.2 nbAvailableId(availableId)

DataManager

C.1 setIdentifiers(reserveId[]) /source ReserveId

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(6)

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setReserveIdSet(ReserveId[])

<< interface >>

ISourceMediumServices

ReserveId ReservationMedium

Boolean cancelerIsReserver Boolean usable = false

ReserveId reserve() cancel(ReserveId)

<< interface >>

IReserverMediumServices

<< interface >>

IObserverComponentServices nbAvailableId(Integer)

* observers

*

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available *

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A.2 nbAvailableId(available −> size) B.2 [id != null] nbAvailableId(available −> size) C.2 [cancelReturn = true] nbAvailableId(available −> size)

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For adapting a model execution, these models@run.time principles can of course be applied (case (b) in Fig. One can notice that in this particular case, there are two models at