Function lightgbm_sys::LGBM_BoosterGetLowerBoundValue

pub unsafe extern "C" fn LGBM_BoosterGetLowerBoundValue(
    handle: BoosterHandle, 
    out_results: *mut f64
) -> c_int

\brief Get model lower bound value. \param handle Handle of booster \param[out] out_results Result pointing to min value \return 0 when succeed, -1 when failure happens