simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
simgrid::kernel::resource::NetworkModel* netmodel =
current_routing == nullptr ? surf_network_model : current_routing->network_model_;
simgrid::kernel::routing::NetZoneImpl* new_zone = nullptr;
simgrid::kernel::resource::NetworkModel* netmodel =
current_routing == nullptr ? surf_network_model : current_routing->network_model_;