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: vgg_argparse.m
    path of file: ./repos/SelfExSR/external/imrender/vgg
    
    the code of the file until where you have to start completion: function [opts,rem_opts] = vgg_argparse(opts,varargin)

%VGG_ARGPARSE  Parse variable arguments into a structure
%  opts = vgg_argparse(inopts,varargin)
%    inopts: structure (cells array) listing valid members and default values
%    varargin: variable arguments of form '<name>',<value>,...
%    opts: opts modified by varargin
%
%  Example:
%    function f = foo(varargin)
%    opts = vgg_argparse(struct('maxiters',10,'verbose',0), varargin)
%    ...
%
%  An unknown option (ie, present in varargin but absent in inopts)
%  causes an error. Calling the function as 
%  [opts,rem_opts] = vgg_argparse(inopts,varargin) returns the unknown
%  option(s) in rem_opts for later use rather than causes an error.
%
%  May also use OPTS = VGG_ARGPARSE(OPTS, ASTRUCT) where ASTRUCT is a struct
%  of options.

    
function [opts,rem_opts] = vgg_argparse(opts,varargin)

%VGG_ARGPARSE  Parse variable arguments into a structure
%  opts = vgg_argparse(inopts,varargin)
%    inopts: structure (cells array) listing valid members and default values
%    varargin: variable arguments of form '<name>',<value>,...
%    opts: opts modified by varargin
%
%  Example:
%    function f = foo(varargin)
%    opts = vgg_argparse(struct('maxiters',10,'verbose',0), varargin)
%    ...
%
%  An unknown option (ie, present in varargin but absent in inopts)
%  causes an error. Calling the function as 
%  [opts,rem_opts] = vgg_argparse(inopts,varargin) returns the unknown
%  option(s) in rem_opts for later use rather than causes an error.
%
%  May also use OPTS = VGG_ARGPARSE(OPTS, ASTRUCT) where ASTRUCT is a struct
%  of options.

% Author: Mark Everingham <me@robots.ox.ac.uk>
% modified by werner, Jan 03
% Date: 16 Jan 02

if iscell(opts)
  opts=struct(opts{:});
end