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/PsPM/src/ext/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
% cfg_item and their layout in terms of cfg_items. Thus, the
% configuration system can be used to generate code for new configuration
% files itself.
%
% This code is part of a batch job configuration system for MATLAB. See 
%      help matlabbatch
% for a general overview.
%_______________________________________________________________________
% Copyright (C) 2007 Freiburg Brain Imaging

% Volkmar Glauche
% $Id: cfg_confgui.m 380 2016-11-08 07:47:23Z tmoser $

rev = '$Rev: 380 $'; %#ok

%% Declaration of fields

% Name
%-----------------------------------------------------------------------
conf_name         = cf
    
function %s = %s\n', tag, n);
fprintf(fid, ...
        ['%% ''%s'' - MATLABBATCH configuration\n' ...
         '%% This MATLABBATCH configuration file has been generated automatically\n' ...
         '%% by MATLABBATCH using ConfGUI. It describes menu structure, validity\n' ...
         '%% constraints and links to run time code.\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{:});
if varargin{1}.gencode_opts.gencode_o_path
    fprintf(fid, '%% ---------------------------------------------------------------------\n');
    fprintf(fid, '%% add path to this mfile\n');
    fprintf(fid, '%% ---------------------------------------------------------------------\n');
    fprintf(fid, 'addpath(fileparts(mfilename(''fullpath'')));\n');
end
fclose(fid);
if varargin{1}.gencode_opts.gencode_o_def
    % Generate defaults file
    [u1, out.djob]  = harvest(out.c0, out.c0, true, true);
    [str, dtag] = gencode(out.djob, sprintf('%s_def', tag));
    dn = sprintf('%s_def', n);
    out.def_file{1} = fullfile(varargin{1}.gencode_dir{1}, sprintf('%s.m', dn));
    [fid, msg] = fopen(out.def_file{1}, 'wt');
    if fid == -1
        cfg_message('matlabbatch:fopen', 'Failed to open ''%s'' for writing:\n%s', out.def_file{1}, msg);
    end