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: gencode.m
    path of file: ./repos/bspm/thirdparty/spm8/matlabbatch/@cfg_item
    
    the code of the file until where you have to start completion: function [str, tag, cind] = gencode(item, tag, tagctx)

% function [str, tag, cind] = gencode(item, tag, tagctx)
% Generate code to recreate a cfg_item object. This function calls the
% cfg_item specific gencode_item method. Instead of creating one large,
% deeply nested struct/cell array, it creates separate variables for each
% cfg_item.
%
% Input arguments:
% item - MATLAB variable to generate code for (the variable itself, not its
%        name)
% tag     - optional: name of the variable, i.e. what will be displayed left
%           of the '=' sign. This can also be a valid struct/cell array
%           reference, like 'x(2).y'. If not provided, inputname(1) will be
%           used.
% tagctx  - optional: variable names not to be used (e.g. keywords,
%           reserved variables). A cell array of strings.
%
% Output arguments:
% str  - cellstr containing code lines to reproduce 
% tag  - name of the generated variable
% cind - index into str to the line where the variable assignment is coded
%
% 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: gencode.m 3355 2009-09-04 09:37:35Z volkmar $

    
function [str, tag, cind] = gencode(item, tag, tagctx)

% function [str, tag, cind] = gencode(item, tag, tagctx)
% Generate code to recreate a cfg_item object. This function calls the
% cfg_item specific gencode_item method. Instead of creating one large,
% deeply nested struct/cell array, it creates separate variables for each
% cfg_item.
%
% Input arguments:
% item - MATLAB variable to generate code for (the variable itself, not its
%        name)
% tag     - optional: name of the variable, i.e. what will be displayed left
%           of the '=' sign. This can also be a valid struct/cell array
%           reference, like 'x(2).y'. If not provided, inputname(1) will be
%           used.
% tagctx  - optional: variable names not to be used (e.g. keywords,
%           reserved variables). A cell array of strings.
%
% Output arguments:
% str  - cellstr containing code lines to reproduce 
% tag  - name of the generated variable
% cind - index into str to the line where the variable assignment is coded
%
% 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: gencode.m 3355 2009-09-04 09:37:35Z volkmar $

rev = '$Rev: 3355 $'; %#ok

if nargin < 2
    tag = inputname(1);
end