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_recodeevent.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8/external/fieldtrip
    
    the code of the file until where you have to start completion: function [ev] = ft_recodeevent(cfg, event, trl)

% FT_RECODEEVENT will recode the event structure, given the trial
% definition that was analyzed
%
% In FieldTrip, you always start with defining a "trl" field containing
% the samples in the raw datafile that you want to analyze. That "trl"
% is based on the events in the dataset. After artifact rejection, it may
% be the case that trials have been removed completely, or that trials
% have been cut into pieces. This complicates finding a match between the
% original events and the pieces of data that are analyzed. This functino
% restores that match.
%
% Use as
%   [ev] = 
    
function
ft_defaults
ft_preamble help

% set the defaults
if ~isfield(cfg, 'eventtype'),  cfg.eventtype   = [];             end
if ~isfield(cfg, 'eventvalue'), cfg.eventvalue  = [];             end
if ~isfield(cfg, 'searchrange'),cfg.searchrange = 'anywhere';     end
if ~isfield(cfg, 'nearestto'),  cfg.nearestto   = 'trialzero';    end
if ~isfield(cfg, 'match'),      cfg.match       = 'nearest';      end
if ~isfield(cfg, 'output'),     cfg.output      = 'eventvalue';   end

% these should be numeric lists or cell-arrays with strings
if ischar(cfg.eventtype)
  cfg.eventtype = {cfg.eventtype};
end
if ischar(cfg.eventvalue)
  cfg.eventvalue = {cfg.eventvalue};
end

if nargin==2
  % event and trl are not specified in the function call, but the data is given ->
  % try to locate event and trl in the configuration
  data  = event;                       % rename the input variable
  event = ft_findcfg(data.cfg, 'event');  % search for the event field
  trl   = ft_findcfg(data.cfg, 'trl');    % search for the trl field
  if isempty(event)
    error('could not locate event structure in the data');
  elseif isempty(trl)
    error('could not locate trial definition in the data');
  end