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: badtrials.m
    path of file: ./repos/bspm/thirdparty/spm12/@meeg
    
    the code of the file until where you have to start completion: function res = badtrials(this, varargin)
% Method for getting/setting bad trials
% FORMAT res = badtrials(this)
% _______________________________________________________________________
% Copyright (C) 2011-2012 Wellcome Trust Centre for Neuroimaging

% Christophe Phillips
% $Id: badtrials.m 5592 2013-07-24 16:25:55Z vladimir $

    
function res = badtrials(this, varargin)
% Method for getting/setting bad trials
% FORMAT res = badtrials(this)
% _______________________________________________________________________
% Copyright (C) 2011-2012 Wellcome Trust Centre for Neuroimaging

% Christophe Phillips
% $Id: badtrials.m 5592 2013-07-24 16:25:55Z vladimir $


if length(varargin) == 2 && ~isempty(varargin{1})
    % make sure that the two inputs for set are the same length
    if ~(length(varargin{2}) == 1 || (length(varargin{1}) == length(varargin{2})))
        error('Use either same vector length or scalar for value');
    end