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_preamble_loadvar.m
    path of file: ./repos/fecgsyn/subfunctions/data-generation/libs/fieldtrip/utilities/private
    
    the code of the file until where you have to start completion: % FT_PREAMBLE_LOADVAR is a helper script that optionally loads one or
% multiple FieldTrip data structures from mat files on disk, as an
% alternative to the user specifying the data structures as input variables
% to the calling function. This makes use of the cfg.inputfile variable.
%
% Furthermore, this function computes the MD5 hash of the input data structures for
% provenance.
%
% Use as
%   ft_preamble loadvar data
%   ft_preamble loadvar source mri
%   ft_preamble loadvar varargin
%
% See also FT_PREAMBLE, FT_POSTAMBLE, FT_POSTAMBLE_SAVEVAR, FT_PREAMBLE_PROVENANCE

% Copyright (C) 2011-2019, Robert Oostenveld, DCCN
%
% This file is part of FieldTrip, see http://www.fieldtriptoolbox.org
% 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/>.
%
% $Id$

% use an anonymous function
assign = @(var, val) assignin('caller', var, val);

if (isfield(cfg, 'inputfile') && ~isempty(cfg.inputfile)) || exist('Fief7bee_reproducescript', 'var')
  % the input data should be read from file
  
  if exist
    
function computes the MD5 hash of the input data structures for
% provenance.
%
% Use as
%   ft_preamble loadvar data
%   ft_preamble loadvar source mri
%   ft_preamble loadvar varargin
%
% See also FT_PREAMBLE, FT_POSTAMBLE, FT_POSTAMBLE_SAVEVAR, FT_PREAMBLE_PROVENANCE

% Copyright (C) 2011-2019, Robert Oostenveld, DCCN
%
% This file is part of FieldTrip, see http://www.fieldtriptoolbox.org
% 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/>.
%
% $Id$

% use an anonymous function
assign = @(var, val) assignin('caller', var, val);

if (isfield(cfg, 'inputfile') && ~isempty(cfg.inputfile)) || exist('Fief7bee_reproducescript', 'var')
  % the input data should be read from file
  
  if exist('Fief7bee_reproducescript', 'var')
    % the script, input and output files are written to a directory
    
    % write the function input variables to a MATLAB file
    if isequal(iW1aenge_preamble, {'varargin'})
      cfg.inputfile = {};
      iW1aenge_now = datestr(now, 30);
      for i=1:(ft_nargin-1)
        cfg.inputfile{i} = make_or_fetch_inputfile(Fief7bee_reproducescript,...
          sprintf('%s_%s_input_varargin_%d.mat', FjmoT6aA_highest_ft, iW1aenge_now, i),...
          'data', varargin{i}); 
      end