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: mav_dynamics_euler.m
    path of file: ./repos/Flight-Dynamics-and-Control-UAVs/Autopilot Design (Lateral and Longitudinal)
    
    the code of the file until where you have to start completion: function [sys,x0,str,ts,simStateCompliance] = mav_dynamics_euler(t,x,u,
    
function [sys,x0,str,ts,simStateCompliance]=mdlInitializeSizes(MAV)

%
% call simsizes for a sizes structure, fill it in and convert it to a
% sizes array.
%
% Note that in this example, the values are hard coded.  This is not a
% recommend