XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sg_host, sd, "Logging specific to sg_hosts");
extern std::unordered_map<std::string, simgrid::s4u::Host*>
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(sg_host, sd, "Logging specific to sg_hosts");
extern std::unordered_map<std::string, simgrid::s4u::Host*>