CP::IFakeBkgTool Node1 CP::IFakeBkgTool + addEvent() + getTotalYield() + register1DHistogram() + register2DHistogram() + register3DHistogram() + saveProgress() + getSystDescriptor() + defaultSelection() + defaultProcess() Node2 CP::ISystematicsTool + isAffectedBySystematic() + applySystematicVariation() Node2->Node1 Node3 CP::IReentrantSystematicsTool + affectingSystematics() + recommendedSystematics() Node3->Node2 Node4 asg::IAsgTool + ~IAsgTool() + print() Node4->Node3 Node5 IAlgTool Node5->Node4