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: read_mayo_mef21.m
    path of file: ./repos/fieldtrip/fileio/private
    
    the code of the file until where you have to start completion: function mayo_out = read_mayo_mef21(varargin)
% READ_MAYO_MEF21 read header, event and data from the files formatted in MEF2.1
%
% Syntax:
%   hdr = read_mayo_mef21(filename)
%   hdr = read_mayo_mef21(filename, password)
%   evt = read_mayo_mef21(filename, password, hdr)
%   dat = read_mayo_mef21(filename, password, hdr, begsample, endsample, cha
    
function mayo_mef30

% =========================================================================
% subroutines
% =========================================================================
function q = parseInputs(varargin)

% default
default_pw = struct([]);
default_hr = struct([]);
default_bs = [];
default_es = [];
default_ci = [];

% parse rule
p = inputParser;
p.addRequired('filename', @ischar);
p.addOptional('password', default_pw, @(x) isstruct(x) || isempty(x));
p.addOptional('hdr', default_hr, @isstruct);
p.addOptional('begsample', default_bs, @isnumeric);
p.addOptional('end