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: subsref.m
    path of file: ./repos/spm12/matlabbatch/@cfg_dep
    
    the code of the file until where you have to start completion: function varargout = subsref(dep, subs)

% function varargout = subsref(dep, subs)
% subscript references we have to deal with are:
% one level
% dep.(field)   - i.e. struct('type',{'.'} ,'subs',{field})

    
function varargout = subsref(dep, subs)

% function varargout = subsref(dep, subs)
% subscript references we have to deal with are:
% one level
% dep.(field)   - i.e. struct('type',{'.'} ,'subs',{field})
% dep(idx)      - i.e. struct('type',{'()'},'subs',{idx})
% two levels
% dep(idx).(field)
%
% to be dealt with elsewhere
% dep.(field){fidx}
% three levels
% dep(idx).(field){fidx}
%
% 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: subsref.m 5689 2013-10-11 14:58:30Z volkmar $

rev = '$Rev: 5689 $'; %#ok

if strcmpi(subs(1).type, '()')
    % select referenced objects from input array
    dep = dep(subs(1).subs{:});
    if numel(subs) == 1
        % done, return selected objects
        varargout{1} = dep;
        return;
    else
        % continue, avoid recursion
        subs = subs(2:end