public function init(string $url = null):void {
		$this->ch = curl_init($url);
		CurlObjectLookup::add($this);
	}
public function init(string $url = null):void {
		$this->ch = curl_init($url);
		CurlObjectLookup::add($this);
	}
Initialize a cURL session
@see http://php.net/manual/en/function.curl-init.php