Function lightgbm_sys::LGBM_BoosterLoadModelFromString

pub unsafe extern "C" fn LGBM_BoosterLoadModelFromString(
    model_str: *const c_char, 
    out_num_iterations: *mut c_int, 
    out: *mut BoosterHandle
) -> c_int

\brief Load an existing booster from string. \param model_str Model string \param[out] out_num_iterations Number of iterations of this booster \param[out] out Handle of created booster \return 0 when succeed, -1 when failure happens