Function gsl_sys::gsl_multifit_nlinear_eval_df

pub unsafe extern "C" fn gsl_multifit_nlinear_eval_df(
    x: *const gsl_vector, 
    f: *const gsl_vector, 
    swts: *const gsl_vector, 
    h: f64, 
    fdtype: gsl_multifit_nlinear_fdtype, 
    fdf: *mut gsl_multifit_nlinear_fdf, 
    df: *mut gsl_matrix, 
    work: *mut gsl_vector
) -> c_int