public function isStreamWrapped()
	{
		$maybeStreamWrapped = $this->partCount > 1 && $this->firstPart !== '' && $this->parts[1] === '' && ':' === substr($this->firstPart, -1);
		if (! $maybeStreamWrapped) {
			return false;
		}
		$name = substr($this->firstPart, 0, -1);
		return in_array($name, stream_get_wrappers());
	}