docs: def publish_extensions(self, handler):
          """Publish the Media RSS Feed elements as XML."""
          if isinstance(self.media_content, list):
              [PyRSS2Gen._opt_element(handler, "media:content", mc_element) for
               mc_element in self.media_content]
          else:
              PyRSS2Gen._opt_element(handler, "media:content",
                                     self.media_content)
  
          if hasattr(self, 'media_title'):
              PyRSS2Gen._opt_element(handler, "media:title", self.media_title)
  
          if hasattr(self, 'media_text'):
              PyRSS2Gen._opt_element(handler, "media:text", self.media_text)