How to use the httpcore.models.URL function in httpcore

def redirect_url(self, request: Request, response: Response) -> URL:
        """
        Return the URL for the redirect to follow.
        """
        location = response.headers["Location"]

        url = URL(location, allow_relative=True)

        # Facilitate relative 'Location' headers, as allowed by RFC 7231.
        # (e.g. '/path/to/resource' instead of 'http://domain.tld/path/to/resource')
        if url.is_relative_url:
            url = url.resolve_with(request.url)

        # Attach previous fragment if needed (RFC 7231 7.1.2)
        if request.url.fragment and not url.fragment:
            url = url.copy_with(fragment=request.url.fragment)

        return url