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_check.m
    path of file: ./repos/spm/matlabbatch/@cfg_exbranch
    
    the code of the file until where you have to start completion: function [sts, val] = subsasgn_check(item,subs,val)

% function [sts, val] = subsasgn_check(item,subs,val)
% Check whether .prog, .vout and .vfiles are functions or function
% handles and whether dependenc
    
function or function handle on ' ...
                     'MATLAB path.'], subsasgn_checkstr(item,subs));
        end
    case {'sdeps', 'tdeps', 'sout'}
        sts = isempty(val) || isa(val, 'cfg_dep');
        if isempty(val)
            val = cfg_dep;
            val = val([]);
        end