pub unsafe extern "C" fn gsl_spline2d_alloc(
T: *const gsl_interp2d_type,
xsize: usize,
ysize: usize,
) -> *mut gsl_spline2dpub unsafe extern "C" fn gsl_spline2d_alloc(
T: *const gsl_interp2d_type,
xsize: usize,
ysize: usize,
) -> *mut gsl_spline2d