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: Test_3.m
    path of file: ./repos/miss_hit/tests/style/function_docs/file_header
    
    the code of the file until where you have to start completion: function x = Test_3(y)
    % TEST_3 First test

    
function x = Test_3(y)
    % TEST_3 First test
    %   This is a simple example of a function with a documentation
    %   string.
    %
    %   (c) Copyright 2021 Mr Florian Schanda
    x = y;
end