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: cfg_confgui.m
    path of file: ./repos/spm12/matlabbatch/cfg_confgui
    
    the code of the file until where you have to start completion: function menu_cfg = cfg_confgui

% This function describes the user defined fields for each kind of
% c
    
function %s = %s\n', dtag, dn);
    fprintf(fid, ...
        ['%% ''%s'' - MATLABBATCH defaults\n' ...
        '%% This MATLABBATCH defaults file has been generated automatically\n' ...
        '%% by MATLABBATCH using ConfGUI. It contains all pre-defined values for\n' ...
        '%% menu items and provides a full documentation of all fields that may\n' ...
        '%% be present in a job variable for this application.\n' ...
        '%% Changes to this file will be overwritten if the ConfGUI batch is executed again.\n' ...
        '%% Created at %s.\n'], out.c0.name, datestr(now, 31));
    fprintf(fid, '%s\n', str{:});
    fclose(fid);
end
if varargin{1}.gencode_opts.gencode_o_mlb
    % Generate cfg_util initialisation file
    out.mlb_file{1} = fullfile(varargin{1}.gencode_dir{1}, 'cfg_mlbatch_appcfg.m');
    [fid, msg] = fopen(out.mlb_file{1}, 'wt');
    if fid == -1
        cfg_message('matlabbatch:fopen', 'Failed to open ''%s'' for writing:\n%s', out.mlb_file{1}, msg);
    end