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_read_event.m
    path of file: ./repos/spm/external/fieldtrip/fileio
    
    the code of the file until where you have to start completion: function [event] = ft_read_event(filename, varargin)

% FT_READ_EVENT reads all events from an EEG, MEG or other time series dataset and
% returns them in a common data-independent structure. The supported formats are
% listed in the accompanying FT_READ_HEADER function.
%
% Use 
    
function
trigpadding      = ft_getopt(varargin, 'trigpadding');               % default is assigned in subfunction
headerformat     = ft_getopt(varargin, 'headerformat');
dataformat       = ft_getopt(varargin, 'dataformat');
eventformat      = ft_getopt(varargin, 'eventformat');
threshold        = ft_getopt(varargin, 'threshold');                 % this is used for analog channels
tolerance        = ft_getopt(varargin, 'tolerance', 1);
checkmaxfilter   = ft_getopt(varargin, 'checkmaxfilter');            % will be passed to FT_READ_HEADER
readbids         = ft_getopt(varargin, 'readbids', 'ifmakessense');  % will be passed to FT_READ_HEADER
chanindx         = ft_getopt(varargin, 'chanindx');                  % this allows to override the automatic trigger channel detection (useful for Yokogawa & Ricoh, and for EDF with variable sampling rate)
trigindx         = ft_getopt(varargin, 'trigindx');                  % deprecated, use chanindx instead
triglabel        = ft_getopt(varargin, 'triglabel');                 % deprecated, use chanindx instead
password         = ft_getopt(varargin, 'password', struct([]));
combinebinary    = ft_getopt(varargin, 'combinebinary');             % this is an option for yokogawa data

% for backward compatibility, added by Robert in Sept 2019
if ~isempty(trigindx)
  ft_warning('please use ''chanindx'' instead of ''trigindx''')
  chanindx = trigindx;
end