'If you set `articles_are_obfuscated` this method is called with
every article URL. It should return the path to a file on the filesystem
that contains the article HTML. That file is processed by the recursive
HTML fetching engine, so it can contain links to pages/images on the web.
This method is typically useful for sites that try to make it difficult to
access article content automatically.'

def get_obfuscated_article(self, url):

    raise NotImplementedError
