Session::__construct( string|WpOrgRequestsStringable|null $url = null, array $headers = array(), array $data = array(), array $options = array() )

	public function __construct($url = null, $headers = [], $data = [], $options = []) {
		if ($url !== null && InputValidator::is_string_or_stringable($url) === false) {
			throw InvalidArgument::create(1, '$url', 'string|Stringable|null', gettype($url));
		}

		if (is_array($headers) === false) {
			throw InvalidArgument::create(2, '$headers', 'array', gettype($headers));
		}

		if (is_array($data) === false) {
			throw InvalidArgument::create(3, '$data', 'array', gettype($data));
		}

		if (is_array($options) === false) {
			throw InvalidArgument::create(4, '$options', 'array', gettype($options));
		}

		$this->url     = $url;
		$this->headers = $headers;
		$this->data    = $data;
		$this->options = $options;

		if (empty($this->options['cookies'])) {
			$this->options['cookies'] = new Jar();
		}
	}