Function gsl_sys::gsl_bspline_deriv_eval_nonzero

pub unsafe extern "C" fn gsl_bspline_deriv_eval_nonzero(
    x: f64, 
    nderiv: usize, 
    dB: *mut gsl_matrix, 
    istart: *mut usize, 
    iend: *mut usize, 
    w: *mut gsl_bspline_workspace
) -> c_int