MuonGMR4::RpcReadoutElement::parameterBook Node1 MuonGMR4::RpcReadoutElement ::parameterBook + halfLength + halfThickness + halfWidth + nGasGaps + nPanelsInPhi + layers + phiDesign + etaDesign + layerBounds Node2 MuonGMR4::RpcReadoutElement ::defineArgs Node1->Node2