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: spm_print.m
    path of file: ./repos/ExploreASL/External/SPMmodified
    
    the code of the file until where you have to start completion: function varargout = spm_print(varargin)
% Print figure 
% FORMAT spm_print(fname,F,opts)
% fname  - output filename [Default: 'spm_<date>']
% F      - figure handle or tag [Default: 'Graphics']
% opts   - structure containing printing options
%          [Default: defaults.ui.print from spm_defaults.m]
%
% FORMAT spm_print(job)
% Run a batch print job (see spm_cfg_print)

    
function varargout = spm_print(varargin)
% Print figure 
% FORMAT spm_print(fname,F,opts)
% fname  - output filename [Default: 'spm_<date>']
% F      - figure handle or tag [Default: 'Graphics']
% opts   - structure containing printing options
%          [Default: defaults.ui.print from spm_defaults.m]
%
% FORMAT spm_print(job)
% Run a batch print job (see spm_cfg_print)
%__________________________________________________________________________
% Copyright (C) 1994-2017 Wellcome Trust Centre for Neuroimaging

% John Ashburner
% $Id: spm_print.m 7018 2017-02-15 13:36:48Z guillaume $


%-Shortcut for list of graphics file formats available
%--------------------------------------------------------------------------
if nargin > 0 && ischar(varargin{1}) && strcmpi(varargin{1},'format')
    [varargout{1:nargout}] = print_format(varargin{2:end