MuonR4::MdtSegmentFitter::ResidualWithPartials Node1 MuonR4::MdtSegmentFitter ::ResidualWithPartials + residual + gradient + hessian + evalPhiPars + nPars Node2 MuonR4::MdtSegmentFitter ::ResidualAuxillaries + projDir + partProjDir + partWirePlaneProj + projIntoWirePlane + projDirLenSq + invProjLenSq + invProjLen + nLinePars Node2->Node1