You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: simpleWingSetLiftCurve.m
    path of file: ./repos/LADAC/aerodynamics/simple_wing
    
    the code of the file until where you have to start completion: function wing = simpleWingSetLiftCurve( wing )
% simpleWingSetLiftCurve calculates the lift coefficient with respect to
% the angle of attack.
% The inputs of this function are characteristic points on the lift curve.
% In this function these points are interpolated with splines. 
% The outputs of this function is the angle of attack vector X and the 
% lift coefficient vector Y  

% Disclamer:
%   SPDX-License-Identifier: GPL-3.0-only
% 
%   Copyright (C) 2020-2022 Yannic Beyer

    
function wing = simpleWingSetLiftCurve( wing )
% simpleWingSetLiftCurve calculates the lift coefficient with respect to
% the angle of attack.
% The inputs of this function are characteristic points on the lift curve.
% In this function these points are interpolated with splines. 
% The outputs of this function is the angle of attack vector X and the 
% lift coefficient vector Y  

% Disclamer:
%   SPDX-License-Identifier: GPL-3.0-only
% 
%   Copyright (C) 2020-2022 Yannic Beyer
%   Copyright (C) 2022 TU Braunschweig, Institute of Flight Guidance
% *************************************************************************

% angle of attack breakpoints
x(1) = -90;
x(2) = -wing.polar.params.alpha_max2;
x(3) = -wing.polar.params.alpha_min;
x(4) = -wing.polar.params.alpha_max;
x(5) = -wing.polar.params.alpha_linend