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: nconditions.m
    path of file: ./repos/fieldtrip/external/spm8/@meeg
    
    the code of the file until where you have to start completion: function res = nconditions(obj)
% Method for getting the number of unique conditions in the file
% FORMAT res = nconditions(obj)

    
function res = nconditions(obj)
% Method for getting the number of unique conditions in the file
% FORMAT res = nconditions(obj)
% _______________________________________________________________________
% Copyright (C) 2008 Wellcome Trust Centre for Neuroimaging

% Vladimir Litvak
% $Id: nconditions.m 2978 2009-03-27 14:43:08Z guillaume $

try
    res = length(unique(conditions(obj)));
catch
    res = 0;
end