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_definetrial.m
    path of file: ./repos/fecgsyn/subfunctions/data-generation/libs/fieldtrip
    
    the code of the file until where you have to start completion: function [cfg] = ft_definetrial(cfg)

% FT_DE
    
function ''%s''\n', func2str(cfg.trialfun));
  end

  % determine the number of outpout arguments of the user-supplied trial function
  try
    % the nargout function in MATLAB 6.5 and older does not work on function handles
    num = nargout(cfg.trialfun);
  catch
    num = 1;
  end