ActsTrk::TruthTrackBuilderTool::TruthHit Node1 ActsTrk::TruthTrackBuilder Tool::TruthHit + globalPosition   Node2 xAOD::UncalibratedMeasurement_v1   + UncalibratedMeasurement_v1() + UncalibratedMeasurement_v1() + operator=() + ~UncalibratedMeasurement_v1() + UncalibratedMeasurement_v1() + operator=() + identifierHash() + identifier() + localPosition() + localPosition() + localCovariance() + localCovariance() + type() + numDimensions() + setIdentifierHash() + setIdentifier() + setMeasurement() * identifierHash() * identifier() * localPosition() * localPosition() * localCovariance() * localCovariance() * type() * numDimensions() * setIdentifierHash() * setIdentifier() * setMeasurement() Node2->Node1 +hit Node3 SG::AuxElement     Node3->Node2