Can't find method of a model

model is successfully loaded but have no methods such as forward and others,model is transferred by sevenn_get_model( SevenNet/README.md at a1fb4c44e767055f822e5e2d3817f4214f65c64b · MDIL-SNU/SevenNet)

code for load model:
std::unordered_map<std::string, std::string> meta_dict = {
{“chemical_symbols_to_index”, “”},
{“cutoff”, “”},
{“num_species”, “”},
{“model_type”, “”},
{“version”, “”},
{“dtype”, “”},
{“time”, “”}};

static bool model_loaded = false;
if (!model_loaded){
    model = torch::jit::load(model_path, device, meta_dict);
    model_loaded = true;
}