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: vl_setup.m
    path of file: ./repos/robotic_perception/Trafic_Sign_Recognition/code/vlfeat-0.9.20-bin/vlfeat-0.9.20/toolbox
    
    the code of the file until where you have to start completion: function path = vl_setup(varargin)
% VL_SETUP Add VLFeat Toolbox to the path
%   PATH = VL_SETUP() adds the VLFeat Toolbox to MATLAB path and
%   returns the path PATH to the VLFeat package.
%
%   VL_SETUP('NOPREFIX') adds aliases to each function that do not
%   contain the VL_ prefix. For example, with this option it is
%   possible to use SIFT() instead of VL_SIFT().
%
%   VL_SETUP('TEST') or VL_SETUP('XTEST') adds VLFeat unit test
%   function suite. See also VL_TEST().
%
%   VL_SETUP('QUIET') does not print the greeting message.
%
%   See also: VL_ROOT(), VL_HELP().

% Authors: Andrea Vedaldi and Brian Fulkerson

% Copyright (C) 2007-12 Andrea Vedaldi and Brian Fulkerson.
% All rights reserved.
%
% This file is part of the VLFeat library and is made available under
% the terms of the BSD license (see the COPYING file).

noprefix = false ;
quiet = true ;
xtest = false ;
demo = false ;

for ai=1:length(varargin)
  opt = varargin{ai} ;
  switch lower(opt)
    case {'noprefix', 'usingvl'}
      noprefix = true ;
    case {'test', 'xtest'}
      xtest = true ;
    case {'demo'}
      demo = true ;
    case {'quiet'}
      quiet = true ;

    
function path = vl_setup(varargin)
% VL_SETUP Add VLFeat Toolbox to the path
%   PATH = VL_SETUP() adds the VLFeat Toolbox to MATLAB path and
%   returns the path PATH to the VLFeat package.
%
%   VL_SETUP('NOPREFIX') adds aliases to each function that do not
%   contain the VL_ prefix. For example, with this option it is
%   possible to use SIFT() instead of VL_SIFT().
%
%   VL_SETUP('TEST') or VL_SETUP('XTEST') adds VLFeat unit test
%   function suite. See also VL_TEST().
%
%   VL_SETUP('QUIET') does not print the greeting message.
%
%   See also: VL_ROOT(), VL_HELP().

% Authors: Andrea Vedaldi and Brian Fulkerson

% Copyright (C) 2007-12 Andrea Vedaldi and Brian Fulkerson.
% All rights reserved.
%
% This file is part of the VLFeat library and is made available under
% the terms of the BSD license (see the COPYING file).

noprefix = false ;
quiet = true ;
xtest = false ;
demo = false ;

for ai=1:length(varargin)
  opt = varargin{ai} ;
  switch lower(opt)
    case {'noprefix', 'usingvl'}
      noprefix = true ;
    case {'test', 'xtest'}
      xtest = true ;
    case {'demo'}
      demo = true ;
    case {'quiet'}
      quiet = true ;
    case {'verbose'}
      quiet = false ;
    otherwise
      error('Unknown option ''%s''.', opt) ;
  end