if (xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL) != nullptr) {
simgrid::surf::Storage* storage =
static_cast<simgrid::surf::Storage*>(xbt_lib_get_or_null(storage_lib, key, SURF_STORAGE_LEVEL));
if (xbt_lib_get_level(xbt_lib_get_elm_or_null(storage_lib, key), SURF_STORAGE_LEVEL) != nullptr) {
simgrid::surf::Storage* storage =
static_cast<simgrid::surf::Storage*>(xbt_lib_get_or_null(storage_lib, key, SURF_STORAGE_LEVEL));
if (!host_elm)
surf_parse_error("Unable to attach storage %s: host %s does not exist.", storage->getName(), storage->attach_);
}
if (!host_elm)
surf_parse_error("Unable to attach storage %s: host %s does not exist.", storage->getName(), storage->attach_);
}