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: harvest.m
    path of file: ./repos/PsPM/src/ext/matlabbatch/@cfg_choice
    
    the code of the file until where you have to start completion: function [tag, val, typ, dep, chk, cj] = harvest(item, cj, dflag, rflag)

% function [tag, val, typ, dep, chk, cj] = harvest(item, cj, dflag, rflag)
% Harvest a cfg_branch object.
% Input arguments:
% item  - item to be harvested
% cj    - configuration tree (passed unmodified)
% dflag - if true, harvest defaults tree, otherwise filled
    
function and its
%       childrens check functions. A job is ready to run if all
%       dependencies are resolved and chk status is true.
%
% This function is identical for cfg_branch and cfg_(m)choice classes.
%
% 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: harvest.m 380 2016-11-08 07:47:23Z tmoser $

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

typ = class(item);
tag = gettag(item);
val = struct([]);
dep = []; % Placeholder for depend