def __init__(self, cr):
        ExperimentBarrelBase.__init__(self)
        DistributedNode.__init__(self, cr)

        self.barrel = None
        self.icon = None
        self.collSphere = None
        self.collNode = None
        self.collNodePath = None
        self.animTrack = None
    def __init__(self, air):
        ExperimentBarrelBase.__init__(self)
        DistributedNodeAI.__init__(self, air)

        self.usedBy = []