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/malini/Codes/deconvolution - model/spm8/matlabbatch/@cfg_exbranch
    
    the code of the file until where you have to start completion: function varargout = subsref(item, subs)

% function varargout = subsref(item, subs)
% subscript references we have to deal with are:
% one level

    
function varargout = subsref(item, subs)

% function varargout = subsref(item, subs)
% subscript references we have to deal with are:
% one level
% item.(field)   - i.e. struct('type',{'.'} ,'subs',{field})
% item(idx)      - i.e. struct('type',{'()'},'subs',{idx})
% two levels
% item(idx).(field)
%
% to be dealt with elsewhere
% item.(field){fidx}
% three levels
% item(idx).(field){fidx}
% This function is identical for all classes derived from cfg_item, but it
% needs to be present in the class folder to access fields added by the
% derived class.
%
% 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 4864 2012-08-27 13:57:31Z volkmar $

rev = '$Rev: 4864 $'; %#ok

persistent local_mysubs_fields;
persistent par_class;
persistent par_fields;
if ~iscell(local_mysubs_fields)
    local_mysubs_fields = mysubs_fields;
    citem = class(item);
    switch citem
        case 'cfg_exbranch',
            par_class = 'cfg_branch';
            pf1 = subs_fields(item.cfg_branch);
            pf2 = subs_fields(cfg_item);
            par_fields = [pf1(:); pf2(:)]';
        case 'cfg_item',
            par_class = '';
            par_fields = {};
        otherwise
            par_class = 'cfg_item';
            par_fields = subs_fields(item.cfg_item);
    end