code: def download_class(session, args, class_name):
      
      logging.debug('Downloading new style (on demand) class %s', class_name)
      return download_on_demand_class(session, args, class_name)
docs: Try to download on-demand class.
  
      @return: Tuple of (bool, bool), where the first bool indicates whether
          errors occurred while parsing syllabus, the second bool indicates
          whether the course appears to be completed.
      @rtype: (bool, bool)