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: f_get_default_fontsize.m
    path of file: ./repos/erplab/studio_functions/Functions/EStudio
    
    the code of the file until where you have to start completion: 



function FonsizeDefault = f_get_default_fontsize()

if ismac
    % Code to run on Mac platform
    FonsizeDefault = 12;
elseif isunix
    % Code to run on Linux platform
    FonsizeDefault = 9;
elseif ispc
    % Code to run on Windows platf
    
function FonsizeDefault = f_get_default_fontsize()

if ismac
    % Code to run on Mac platform
    FonsizeDefault = 12;
elseif isunix
    % Code to run on Linux platform
    FonsizeDefault = 9;
elseif ispc
    % Code to run on Windows platform
    FonsizeDefault = 9;
else
    FonsizeDefault = 9;
end