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: template.m
    path of file: ./repos/toolbox/external/m2html/@template
    
    the code of the file until where you have to start completion: function tpl = template(root,unknowns)
%TEMPLATE HTML Template Toolbox Constructor
%  TPL = TEMPLATE returns a template object using default values for the
%  root path of the template files ('.') and for the way of handling unknown
%  replacement fields (default is 'remove').
%  TPL = TEMPLATE(ROOT) allows to specify the root path of the template files
%  that will then be provided relative to this path.
%  TPL = TEMPLATE(ROOT,UNKNOWNS) also allows to specify the strategy to apply
%  to unkown fields. UNKNOWNS may be:
%    * 'keep' to do nothing
%    * 'remove' to remove all undefined fields
%    * 'comment' to replace undefined fields by a warning HTML comment.
%
%  The template class allows you to keep your HTML code in some external 
%  files which are completely free of Matlab code, but contain replacement 
%  fields. The class provides you with functions which can fill in the 
%  replacement fields with arbitrary strings. These strings can become very 
%  large, e.g. entire tables.
%  See the PHPLib: <http://www.sanisoft.com/phplib/manual/template.php>
%  See also GET, SET, PARSE

    
function tpl = template(root,unknowns)
%TEMPLATE HTML Template Toolbox Constructor
%  TPL = TEMPLATE returns a template object using default values for the
%  root path of the template files ('.') and for the way of handling unknown
%  replacement fields (default is 'remove').
%  TPL = TEMPLATE(ROOT) allows to specify the root path of the template files
%  that will then be provided relative to this path.
%  TPL = TEMPLATE(ROOT,UNKNOWNS) also allows to specify the strategy to apply
%  to unkown fields. UNKNOWNS may be:
%    * 'keep' to do nothing
%    * 'remove' to remove all undefined fields
%    * 'comment' to replace undefined fields by a warning HTML comment.
%
%  The template class allows you to keep your HTML code in some external 
%  files which are completely free of Matlab code, but contain replacement 
%  fields. The class provides you with functions which can fill in the 
%  replacement fields with arbitrary strings. These strings can become very 
%  large, e.g. entire tables.
%  See the PHPLib: <http://www.sanisoft.com/phplib/manual/template.php>
%  See also GET, SET, PARSE

%  Copyright (C) 2003 Guillaume Flandin <Guillaume@artefact.tk>
%  $Revision: 1.0 $Date: 2003/05/05 22:19:51 $

narginchk(0,2);

switch nargin
	case 0
		tpl = struct('root','.',...
					 'file',{{}},...
					 'handles',{{}},...
					 'varkeys',{{}},...
					 'varvals',{{}},...
					 'unknowns','remove');
		tpl = class(tpl,'template');
	case 1
		if isa(root,'template')
			tpl = root;
		else
			tpl = template;
			tpl = set(tpl,'root',root);
		end