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: getdimsiz.m
    path of file: ./repos/fecgsyn/subfunctions/data-generation/libs/fieldtrip/fileio/private
    
    the code of the file until where you have to start completion: function dimsiz = getdimsiz(data, field, numdim)

% GETDIMSIZ
%
% Use as
%   dimsiz = getdimsiz(data, field)
% or
%   dimsiz = getdimsiz(data, field, numdim)
%

    
function dimsiz = getdimsiz(data, field, numdim)

% GETDIMSIZ
%
% Use as
%   dimsiz = getdimsiz(data, field)
% or
%   dimsiz = getdimsiz(data, field, numdim)
%
% MATLAB will not return the size of a  field in the data structure that has trailing
% singleton dimensions, since those are automatically squeezed out. With the optional
% numdim parameter you can specify how many dimensions the data element has. This
% will result in the trailing singleton dimensions being added to the output vector.
%
% Example use
%   dimord = getdimord(datastructure, fieldname);
%   dimtok = tokenize(dimord, '_');
%   dimsiz = getdimsiz(datastructure, fieldname, numel(dimtok));
%
% See also GETDIMORD, GETDATFIELD

% Copyright (C) 2014-2019, Robert Oostenveld
%
% 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/>.
%
% $Id$

% deal with trailing singleton dimensions
if nargin<3
  numdim = 0;
end