Imbo\EventListener\ImageTransformationCache::__construct PHP Method

    public function __construct(array $params)
    {
        if (!isset($params['path'])) {
            throw new InvalidArgumentException('The image transformation cache path is missing from the configuration', 500);
        }
        $path = $params['path'];
        if (!$this->isWritable($path)) {
            throw new InvalidArgumentException('Image transformation cache path is not writable by the webserver: ' . $path, 500);
        }
        $this->path = $path;
    }