Function lightgbm_sys::LGBM_BoosterNumberOfTotalModel

pub unsafe extern "C" fn LGBM_BoosterNumberOfTotalModel(
    handle: BoosterHandle, 
    out_models: *mut c_int
) -> c_int

\brief Get number of weak sub-models. \param handle Handle of booster \param[out] out_models Number of weak sub-models \return 0 when succeed, -1 when failure happens