GbtsDeviceContext Node1 GbtsDeviceContext + m_deviceId + m_stream + d_size + h_size + m_nLayers + m_nBinPairs + m_maxEtaBin + m_nNodes + m_nMaxEdges + m_minLevel and 42 more... + GbtsDeviceContext() + hostSize() + deviceSize() - GbtsDeviceContext() Node2 TrigAccel::ITk::Tracklet + m_nodes + m_size + m_Q   Node2->Node1 +d_seeds