interface UnroutedUrlAssemblerInterface

interface UnroutedUrlAssemblerInterface {
    
    /**
     * Builds a domain-local or external URL from a URI.
     *
     * For actual implementations the logic probably has to be split up between
     * domain-local URIs and external URLs.
     *
     * @param string $uri
     *   A local URI or an external URL being linked to, such as "base:foo"
     *    or "http://example.com/foo".
     *   - If you provide a full URL, it will be considered an external URL as
     *     long as it has an allowed protocol.
     *   - If you provide only a local URI (e.g. "base:foo"), it will be
     *     considered a path local to Drupal, but not handled by the routing
     *     system.  The base path (the subdirectory where the front controller
     *     is found) will be added to the path. Additional query arguments for
     *     local paths must be supplied in $options['query'], not part of $uri.
     *   - If your external URL contains a query (e.g. http://example.com/foo?a=b),
     *     then you can either URL encode the query keys and values yourself and
     *     include them in $uri, or use $options['query'] to let this method
     *     URL encode them.
     * @param array $options
     *   (optional) An associative array of additional options, with the following
     *   elements:
     *   - 'query': An array of query key/value-pairs (without any URL-encoding) to
     *     append to the URL.
     *   - 'fragment': A fragment identifier (named anchor) to append to the URL.
     *     Do not include the leading '#' character.
     *   - 'absolute': Defaults to FALSE. Whether to force the output to be an
     *     absolute link (beginning with http:). Useful for links that will be
     *     displayed outside the site, such as in an RSS feed.
     *   - 'https': Whether this URL should point to a secure location. If not
     *     defined, the current scheme is used, so the user stays on HTTP or HTTPS
     *     respectively. TRUE enforces HTTPS and FALSE enforces HTTP.
     * @param bool $collect_bubbleable_metadata
     *   (optional) Defaults to FALSE. When TRUE, both the generated URL and its
     *   associated bubbleable metadata are returned.
     *
     * @return string|\Drupal\Core\GeneratedUrl
     *   A string containing a relative or absolute URL.
     *   When $collect_bubbleable_metadata is TRUE, a GeneratedUrl object is
     *   returned, containing the generated URL plus bubbleable metadata.
     *
     * @throws \InvalidArgumentException
     *   Thrown when the passed in path has no scheme.
     */
    public function assemble($uri, array $options = [], $collect_bubbleable_metadata = FALSE);

}