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: list.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8/matlabbatch/@cfg_repeat
    
    the code of the file until where you have to start completion: function [id, stop, val] = list(item, spec, tropts, fn)

% function [id, stop, val] = list(item, spec, tropts, fn)
% Find items in a cfg tree rooted at item that match a specification spec.
% By default, the filled configuration tree is searched (i.e. the
% val-branches of cfg_repeat and cfg_choice nodes). 
% See MATCH for help about spec data structure.
%
% Traversal options
% struct with fields
% stopspec - match spec to stop traversal
% dflag    - traverse val or values tree
% clvl     - current level in tree
% mlvl     - maximum level to traverse - range 1 (top level only) to
%            Inf (all levels)
% cnt      - #items found so far
% mcnt    - max #items to find
% List will stop descending into subtrees if one of the conditions
% following conditions are met: item matches stopspec, clvl >= mlvl, cnt >=
% mcnt. Flag stop is true for nodes where traversal has stopped
% (i.e. items where tropts has stopped further traversal).
%
% A cell list of subsref ids to matching nodes will 
    
function is identical for all cfg_intree 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: list.m 4864 2012-08-27 13:57:31Z volkmar $

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

if match(item, spec)
    id = {struct('type', {}, 'subs', {})};
    tropts.cnt = tropts.cnt + 1;
    stop = false;
    if nargin > 3
        val = cell(1,numel(fn));
        for k = 1:numel(fn)
            switch fn{k}
                case 'class'
                    val{k} = {class(item)};
                case 'level'
                    val{k} = {tropts.clvl};
                case 'all_set'
                    val{k} = {all_set(item)};
                case 'all_set_item'
                    val{k} = {all_set_item(item)};
                case 'showdoc'
                    val{k} = {showmydoc(item,'')};
                case fieldnames(item)
                    val{k} = {subsref(item, substruct('.', fn{k}))};
                otherwise
                    val{k} = {{}};
            end