code: def follow_link(self, link=None, *args, **kwargs):
          
          link = self._find_link_internal(link, args, kwargs)
  
          referer = self.get_url()
          headers = {'Referer': referer} if referer else None
  
          return self.open_relative(link['href'], headers=headers)
docs: Follow a link.
  
          If ``link`` is a bs4.element.Tag (i.e. from a previous call to
          :func:`links` or :func:`find_link`), then follow the link.
  
          If ``link`` doesn't have a *href*-attribute or is None, treat
          ``link`` as a url_regex and look it up with :func:`find_link`.
          Any additional arguments specified are forwarded to this function.
  
          If the link is not found, raise :class:`LinkNotFoundError`.
          Before raising, if debug is activated, list available links in the
          page and launch a browser.
  
          :return: Forwarded from :func:`open_relative`.