GNN_FasTrackConnector::LayerGroup Node1 GNN_FasTrackConnector ::LayerGroup + m_dst + LayerGroup() Node2 std::vector< const GNN_FasTrackConnection * > Node2->Node1 +m_sources Node3 GNN_FasTrackConnection + m_src + m_dst + GNN_FasTrackConnection() + ~GNN_FasTrackConnection() Node3->Node2 +elements Node4 std::vector< int > + elements Node4->Node3 +m_binTable