Function lightgbm_sys::LGBM_BoosterGetLinear

pub unsafe extern "C" fn LGBM_BoosterGetLinear(
    handle: BoosterHandle, 
    out: *mut bool
) -> c_int

\brief Get boolean representing whether booster is fitting linear trees. \param handle Handle of booster \param[out] out The address to hold linear trees indicator \return 0 when succeed, -1 when failure happens