pub unsafe extern "C" fn gsl_interp2d_eval_extrap_e( interp: *const gsl_interp2d, xarr: *const f64, yarr: *const f64, zarr: *const f64, x: f64, y: f64, xa: *mut gsl_interp_accel, ya: *mut gsl_interp_accel, z: *mut f64) -> c_int
