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: subsasgn_job.m
    path of file: ./repos/PsPM/src/ext/matlabbatch/@cfg_mchoice
    
    the code of the file until where you have to start completion: function item = subsasgn_job(item, subs, val)


    
function item = subsasgn_job(item, subs, val)

% function item = subsasgn_job(item, subs, val)
% Treat a subscript reference as a reference in a job structure instead
% of a cfg_item structure. If subs is empty, then the subtree
% beginning at item will be initialised with val. Otherwise, subs(1)
% should have a subscript type of '.' in combination with a tagname from
% item.val. 
%
% 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: subsasgn_job.m 380 2016-11-08 07:47:23Z tmoser $

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

if isempty(subs)
    item = initialise(item, '<DEFAULTS>', false);
    item = initialise(item, val, false);
else
    [sts, vind] = checksubs_job(item, subs, false);
    if sts
        citem = subsasgn_job(subsref(item, substruct('.', treepart(item, false),'{}',{vind})), subs(2:end