Function lightgbm_sys::LGBM_BoosterNumModelPerIteration

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

\brief Get number of trees per iteration. \param handle Handle of booster \param[out] out_tree_per_iteration Number of trees per iteration \return 0 when succeed, -1 when failure happens