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: ft_wizard.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8/external/fieldtrip
    
    the code of the file until where you have to start completion: function varargout = ft_wizard(wizard_filename)

% FT_WIZARD is a graphical user interface to evaluate a FieldTrip analysis
% script one step at a time, allowing you to go to the next step if you are
% content with the data so far, or to the previous step if you want to repeat it
% with different configuration settings.
%
% Use as
%   ft_wizard scriptname
% or 
%   ft_wizard('scriptname')
%
% Use the functional form of FT_WIZARD, such as FT_WIZARD('scriptname'), when
% the name of the script is stored in a string, when an output argument is
% requested, or if the name of the script contains spaces. If you do not
% specify an output argument, the results will be stored as variables in
% the main Matlab workspace. 
% 
% Besides the buttons, you can use the following key combinations
%   Ctrl-O        load a new script from a file
%   Ctrl-S        save the script to a new file
%   Ctrl-E        open the current script in editor
%   Ctrl-P        go to previous step
%   Ctrl-N        go to next step

    
function varargout = ft_wizard(wizard_filename)

% FT_WIZARD is a graphical user interface to evaluate a FieldTrip analysis
% script one step at a time, allowing you to go to the next step if you are
% content with the data so far, or to the previous step if you want to repeat it
% with different configuration settings.
%
% Use as
%   ft_wizard scriptname
% or 
%   ft_wizard('scriptname')
%
% Use the functional form of FT_WIZARD, such as FT_WIZARD('scriptname'), when
% the name of the script is stored in a string, when an output argument is
% requested, or if the name of the script contains spaces. If you do not
% specify an output argument, the results will be stored as variables in
% the main Matlab workspace. 
% 
% Besides the buttons, you can use the following key combinations
%   Ctrl-O        load a new script from a file
%   Ctrl-S        save the script to a new file
%   Ctrl-E        open the current script in editor
%   Ctrl-P        go to previous step
%   Ctrl-N        go to next step
%   Ctrl-Q        quit, do not save the variables
%   Ctrl-X        exit, save the variables to the workspace
% 
% See also FT_ANALYSISPROTOCOL

% Copyright (C) 2007-2010, Robert Oostenveld
%
% This file is part of FieldTrip, see http://www.ru.nl/neuroimaging/fieldtrip
% for the documentation and details.
%
%    FieldTrip is free software: you can redistribute it and/or modify
%    it under the terms of the GNU General Public License as published by
%    the Free Software Foundation, either version 3 of the License, or
%    (at your option) any later version.
%
%    FieldTrip is distributed in the hope that it will be useful,
%    but WITHOUT ANY WARRANTY; without even the implied warranty of
%    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%    GNU General Public License for more details.
%
%    You should have received a copy of the GNU General Public License
%    along with FieldTrip. If not, see <http://www.gnu.org/licenses/>.
%
% $Id: ft_wizard.m 7123 2012-12-06 21:21:38Z roboos $

% this function is a wrapper around the actual GUI function
% the main purpose of this function is to provide a workspace where the
% intermediate results can be stored

% the wizard_ok variable will be set to 0/1 by the wizard_base function
wizard_ok = 0;

if nargin>0
  wizard_fig = wizard_base(wizard_filename);
else
  wizard_fig = wizard_base;
end