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: test_mayo_mef.m
    path of file: ./repos/fieldtrip/test
    
    the code of the file until where you have to start completion: function test_mayo_mef(datapath)

% WALLTIME 00:10:00
% MEM 3gb
% DEPENDENCY read_mayo_mef21 read_mayo_mef30
% DATA private

% NOTE: this function only makes sense when it is run with the
% mef_reader_fieldtrip folder correctly added to the path, otherwise it
% will just 'run through' without error (but also without testing anything)

% Copyright 2020-2023 Richard J. Cui. Created: Sat 03/21/2020 10:35:23.147 PM
%
    
function is executed in house
  ft_warning('failed to read data of MEF 2.1 sample data');
end

try
  % MEF version 3.0
  % ---------------
  disp(' ')
  disp('--------------------------')
  disp('testing MEF version 3.0...')
  disp('--------------------------')

  % the password of MEF 3.0 sample dataset
  mef30_pw = struct('Level1Password', 'password1', 'Level2Password', ...
    'password2', 'AccessLevel', 2);

  % low-level testing
  fprintf('low-level testing...\n')
  hdr = ft_read_header(mef30_data, 'password', mef30_pw);

  if isempty(hdr)
    ft_error('failed to read header of MEF 3.0 sample dataset')
  end