public function fromArray($options)
    {
        if (isset($options['Protocol'])) {
            Validate::isString($options['Protocol'], 'options[Protocol]');
            $this->_protocol = $options['Protocol'];
        }
        if (isset($options['Url'])) {
            Validate::isString($options['Url'], 'options[Url]');
            $this->_url = $options['Url'];
        }
    }