docs: def exists_secondary_combined_list(curriculum_abbr,
                                     course_number,
                                     primary_section_id,
                                     quarter,
                                     year):
      """
      Return True if a combined mailman list exists for all
      the secondary course sections in the given quarter and year
      """
      return exists(get_secondary_combined_list_name(curriculum_abbr,
                                                     course_number,
                                                     primary_section_id,
                                                     quarter,
                                                     year))