InDet::SiDetElementRoadMakerData_xk Node1 InDet::SiDetElementRoadMaker Data_xk + isInitialized + SiDetElementRoadMakerData_xk() + ~SiDetElementRoadMakerData_xk() + resetUsageTracker() Node2 std::array< std::vector < std::vector< bool > >, 3 > Node2->Node1 +elementUsageTracker Node3 std::vector< std::vector < bool > > Node3->Node2 +elements Node4 std::vector< bool > + elements Node4->Node3 +elements