public function __construct(TranslatorInterface $translator, \AppKernel $kernel, $configuration)
 {
     $this->params = array('config' => $configuration->getParameter('highlight'), 'cacheDir' => $kernel->getCacheDir());
     $this->providers = new Providers($this->params['config'], $this->params['cacheDir'], $translator);
 }
<?php

/*
 * Copyright 2015 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
use AppEngine\Environment;
$loader = (require_once __DIR__ . '/../app/bootstrap.php.cache');
require_once __DIR__ . '/../app/AppKernel.php';
Environment::doAppEngineCheck();
$kernel = new AppKernel();
$kernel->boot();
Environment::clearCache($kernel->getCacheDir());
echo 'cache cleared';