simgrid::s4u::Host::onStateChange.connect(&onHostChange);
simgrid::s4u::Host::onSpeedChange.connect(&onHostChange);
simgrid::s4u::Host::onDestruction.connect(&onHostDestruction);
simgrid::s4u::Host::onStateChange.connect(&onHostChange);
simgrid::s4u::Host::onSpeedChange.connect(&onHostChange);
simgrid::s4u::Host::onDestruction.connect(&onHostDestruction);