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: tdownload.m
    path of file: ./repos/transformer-models/test/gpt2
    
    the code of the file until where you have to start completion: classdef(SharedTestFixtures = {DownloadGPT2Fixture}) tdownload < matlab.unittest.TestCase
    % tdownloa
    
function verifyFilesExist(test)
            aFile = gpt2.internal.getSupportFilePath('gpt2_vocab.bpe');
            directory = fileparts(aFile);
            files = dir(directory);
            filenames = {files.name};
            % Check that the expected files were downloaded by the fixture.
            % Do not test these are the only files since we now use the
            % support files location, and what files exist there depend