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: list_events.m
    path of file: ./repos/bids-matlab/+bids/+internal
    
    the code of the file until where you have to start completion: function [data, headers, y_labels] = list_events(varargin)
  %
  % Returns summary of all events for a given task.
  %
  % USAGE::
  %
  %  [data, headers, y_labels] = bids.internal.list_events(BIDS, ...
  %                                                         modality, ...
  %                                                         task, ...
  %                                                         'filter', struct(), ...
  %                                                         'trial_type_col', 'trial_type')
  %
  % :param BIDS:       BIDS directory name or BIDS structure (from ``bids.layout``)
  % :type  BIDS:       structure or char
  %
  % :param modality:   name of the modality
  % :type  modality:   char
  %
  % :param task:       name of the task
  % :type  task:       char
  %
  % :param filter:     Optional. List of filters to choose what files to copy
  %                    (see bids.query). Default to ``struct()``.
  % :type  filter:     structure or cell
  %
  % :param trial_type_col:    Optional. Name of the column containing the trial type.
  %                           Defaults to ``'trial_type'``.
  % :type  trial_type_col:    char
  %
  % See also: bids.diagnostic, bids.internal.plot_diagnostic_table
  %

  % (C) Copyright 2022 Remi Gau

  is_dir_or_struct = @(x) (isstruct(x) || isdir(x));

  args = inputParser();
  addRequired(args, 'BIDS', is_dir_or_struct);
  addRequired(args, 'modality');
  addRequired(args, 'task');
  addParameter(args, 'filter', struct(), @isstruct);
  addParameter(args, 'trial_type_col', 'trial_type', @ischar);

    
function [data, headers, y_labels] = list_events(varargin)
  %
  % Returns summary of all events for a given task.
  %
  % USAGE::
  %
  %  [data, headers, y_labels] = bids.internal.list_events(BIDS, ...
  %                                                         modality, ...
  %                                                         task, ...
  %                                                         'filter', struct(), ...
  %                                                         'trial_type_col', 'trial_type')
  %
  % :param BIDS:       BIDS directory name or BIDS structure (from ``bids.layout``)
  % :type  BIDS:       structure or char
  %
  % :param modality:   name of the modality
  % :type  modality:   char
  %
  % :param task:       name of the task
  % :type  task:       char
  %
  % :param filter:     Optional. List of filters to choose what files to copy
  %                    (see bids.query). Default to ``struct()``.
  % :type  filter:     structure or cell
  %
  % :param trial_type_col:    Optional. Name of the column containing the trial type.
  %                           Defaults to ``'trial_type'``.
  % :type  trial_type_col:    char
  %
  % See also: bids.diagnostic, bids.internal.plot_diagnostic_table
  %

  % (C) Copyright 2022 Remi Gau

  is_dir_or_struct = @(x) (isstruct(x) || isdir(x));

  args = inputParser();
  addRequired(args, 'BIDS', is_dir_or_struct);
  addRequired(args, 'modality');
  addRequired(args, 'task');
  addParameter(args, 'filter', struct(), @isstruct);
  addParameter(args, 'trial_type_col', 'trial_type', @ischar);

  parse(args, varargin{:});

  BIDS = args.Results.BIDS;
  modality = args.Results.modality;
  task = args.Results.task;
  trial_type_col = args.Results.trial_type_col;
  filter = args.Results.filter;

  BIDS = bids.layout(BIDS);

  this_filter = filter;
  this_filter.task = task;
  this_filter.modality = modality;
  subjects = bids.query(BIDS, 'subjects', this_filter);

  y_labels = {};
  headers = {};
  data = [];

  if  isempty(subjects)
    return
  end