title Sárkány fejjel tisztítás

participant SnowPlow
participant DragonHead
participant RoadSection 1

activate SnowPlow

SnowPlow->DragonHead: doCleaning(Map, RoadSection 1)
activate DragonHead

DragonHead->SnowPlow: getFuelCount()
activate SnowPlow
SnowPlow-->DragonHead: fuelCount
deactivate SnowPlow

opt fuelCount > 0
DragonHead->SnowPlow: consumeFuel()
activate SnowPlow
SnowPlow-->DragonHead:
deactivate SnowPlow

DragonHead->RoadSection 1: clear()
activate RoadSection 1
RoadSection 1-->DragonHead:
deactivate RoadSection 1

end

DragonHead-->SnowPlow:
deactivate DragonHead

deactivate SnowPlow