HI::IHIVertexSelectionTool Node1 HI::IHIVertexSelectionTool + initialize() + finalize() + getAcceptInfo() + accept() + accept() Node2 IAsgSelectionTool + getAcceptInfo() + accept() Node2->Node1 Node3 asg::IAsgTool + ~IAsgTool() + print() Node3->Node2 Node4 IAlgTool Node4->Node3