Go\Core\AspectKernel::init PHP Method

    public function init(array $options = [])
    {
        if ($this->wasInitialized) {
            return;
        }
        $this->options = $this->normalizeOptions($options);
        define('AOP_ROOT_DIR', $this->options['appDir']);
        define('AOP_CACHE_DIR', $this->options['cacheDir']);
        /** @var $container AspectContainer */
        $container = $this->container = new $this->options['containerClass']();
        $container->set('kernel', $this);
        $container->set('kernel.interceptFunctions', $this->hasFeature(Features::INTERCEPT_FUNCTIONS));
        $container->set('kernel.options', $this->options);
        SourceTransformingLoader::register();
        foreach ($this->registerTransformers() as $sourceTransformer) {
            SourceTransformingLoader::addTransformer($sourceTransformer);
        }
        // Register kernel resources in the container for debug mode
        if ($this->options['debug']) {
            $this->addKernelResourcesToContainer($container);
        }
        AopComposerLoader::init($this->options, $container);
        // Register all AOP configuration in the container
        $this->configureAop($container);
        $this->wasInitialized = true;
    }

 public function init(array $options = array())
 {
     $cacheDir = array_key_exists('cacheDir', $options) ? $options['cacheDir'] : null;
     if ($cacheDir && !is_dir($cacheDir)) {
         mkdir($cacheDir, 0777, true);
     }
     return parent::init($options);
 }