xbt_assert(actor != nullptr, "Unexpected actor (id:%ld).", transition->aid_);
const kernel::actor::Simcall* simcall = &(actor->simcall_);
xbt_assert(simcall->call_ != kernel::actor::Simcall::Type::NONE, "No simcall for process %ld.", transition->aid_);
xbt_assert(actor != nullptr, "Unexpected actor (id:%ld).", transition->aid_);
const kernel::actor::Simcall* simcall = &(actor->simcall_);
xbt_assert(simcall->call_ != kernel::actor::Simcall::Type::NONE, "No simcall for process %ld.", transition->aid_);