AssetManager\Service\AssetCacheManager::getProvider PHP Method

    private function getProvider($path)
    {
        $cacheProvider = $this->getCacheProviderConfig($path);
        if (!$cacheProvider) {
            return null;
        }
        if (is_string($cacheProvider['cache']) && $this->serviceLocator->has($cacheProvider['cache'])) {
            return $this->serviceLocator->get($cacheProvider['cache']);
        }
        // Left here for BC.  Please consider defining a ZF2 service instead.
        if (is_callable($cacheProvider['cache'])) {
            return call_user_func($cacheProvider['cache'], $path);
        }
        $dir = '';
        $class = $cacheProvider['cache'];
        if (!empty($cacheProvider['options']['dir'])) {
            $dir = $cacheProvider['options']['dir'];
        }
        $class = $this->classMapper($class);
        return new $class($dir, $path);
    }