class OEmbed::Response::Link

the original request_url.
A fairly generic type of Response where the url of the resource is

def must_override

See {section 2.3.4.1 of the oEmbed spec}[http://oembed.com/#section2.3] 
def must_override
  super
end

def url

Returns the request_url 
def url
  request_url
end