code: def _enrollment_search(regid, verbose, transcriptable, changed_since_date):
      
      url = "{}{}&{}".format(enrollment_search_url_prefix,
                             regid,
                             urlencode(
                                 {"verbose": verbose,
                                  "transcriptable_course": transcriptable,
                                  "changed_since_date": changed_since_date}))
      return get_resource(url)
docs: See SWS Enrollment search resource spec at:
      https://wiki.cac.washington.edu/x/_qjeAw
      :return: search result json data