public function setFallbackImage($fallbackImage)
    {
        $fallbackImagePath = realpath($fallbackImage);

        if(file_exists($fallbackImagePath) && is_readable($fallbackImagePath))
        {
            $this->fallbackImage = $fallbackImagePath;

            return;
        }

        throw new Exception("Default image missing or not readable, path: $fallbackImage");
    }