IHISubtractorTool Node1 IHISubtractorTool + ~IHISubtractorTool() + subtract() + subtractWithMoments() + updateUsingCluster() + minEnergyForMoments() + usesCells() + getShape() + getIndex() + getModulator() + setShape() + setIndex() + setModulator() Node2 asg::IAsgTool + ~IAsgTool() + print() Node2->Node1 Node3 IAlgTool Node3->Node2