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: mne2grad.m
    path of file: ./repos/fieldtrip/fileio/private
    
    the code of the file until where you have to start completion: function [grad, elec] = mne2grad(hdr, dewar, coilaccuracy, coildeffile)

% MNE2GRAD converts a header from a fif file that was read using the MNE toolbox into
% a gradiometer structure that can be understood by the FieldTrip low-level forward
% and inverse routines.
%
% Use as
%   [grad, elec] = mne2grad(hdr, dewar, coilaccuracy)
% where
%   dewar        = boolean, whether to return it in dewar or head coordinates (default = false, i.e. head coordinates)
%   coilaccuracy = empty or a number (default = [])
%   coildeffile  = empty or a filename of a valid coil_def.dat file
%
% See also CTF2GRAD, BTI2GRAD

%%%%%%%%%%%%%%%%%% BEGIN REVISION HISTORY %%%%%%%%%%%%%%%%%%
%
% Robert Oostenveld 22/01/2016 reimplemented construction of integration
% points on basis of coil_def.dat file from MNE
%
% Laurence Hunt 03/12/2008 (with thanks to Joachim Gross's original script
% based on fiff_access). lhunt@fmrib.ox.ac.uk
%
% Teresa Cheung 09/24/2011 revision to Laurence Hunt's script. The coil
% geometry has been revised to better reflect the coil dimensions of the
% Vectorview (306) planar gradiometers and magnetometers. Coil geometry for
% the Neuromag-122 planar gradiometer is different and is not read with
% this script (coil_type should equal 2)
%
%%%%%%%%%%%%%%%%%% END REVISION HISTORY %%%%%%%%%%%%%%%%%%

% Copyrights (C) 2016, Robert Oostenveld
% Copyrights (C) 2011, Teresa Cheung
% Copyrights (C) 2008, Laurence Hunt
% Copyrights (C) 2005, Joachim Gross
%
% 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.

    
function [grad, elec] = mne2grad(hdr, dewar, coilaccuracy, coildeffile)

% MNE2GRAD converts a header from a fif file that was read using the MNE toolbox into
% a gradiometer structure that can be understood by the FieldTrip low-level forward
% and inverse routines.
%
% Use as
%   [grad, elec] = mne2grad(hdr, dewar, coilaccuracy)
% where
%   dewar        = boolean, whether to return it in dewar or head coordinates (default = false, i.e. head coordinates)
%   coilaccuracy = empty or a number (default = [])
%   coildeffile  = empty or a filename of a valid coil_def.dat file
%
% See also CTF2GRAD, BTI2GRAD

%%%%%%%%%%%%%%%%%% BEGIN REVISION HISTORY %%%%%%%%%%%%%%%%%%
%
% Robert Oostenveld 22/01/2016 reimplemented construction of integration
% points on basis of coil_def.dat file from MNE
%
% Laurence Hunt 03/12/2008 (with thanks to Joachim Gross's original script
% based on fiff_access). lhunt@fmrib.ox.ac.uk
%
% Teresa Cheung 09/24/2011 revision to Laurence Hunt's script. The coil
% geometry has been revised to better reflect the coil dimensions of the
% Vectorview (306) planar gradiometers and magnetometers. Coil geometry for
% the Neuromag-122 planar gradiometer is different and is not read with
% this script (coil_type should equal 2)
%
%%%%%%%%%%%%%%%%%% END REVISION HISTORY %%%%%%%%%%%%%%%%%%

% Copyrights (C) 2016, Robert Oostenveld
% Copyrights (C) 2011, Teresa Cheung
% Copyrights (C) 2008, Laurence Hunt
% Copyrights (C) 2005, Joachim Gross
%
% 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/>.
%
% $Id$

if nargin<2 || isempty(dewar)
  dewar = false;
end