for (int i = 0; i < comm->size(); i++){
auto actor = simgrid::kernel::actor::ActorImpl::by_pid(comm->group()->actor(i));
if (actor != nullptr && actor != myself)
for (int i = 0; i < comm->size(); i++){
auto actor = simgrid::kernel::actor::ActorImpl::by_pid(comm->group()->actor(i));
if (actor != nullptr && actor != myself)