code: def add_params(cls, cmdline_parser):
          
  
          parser = cmdline_parser
  
          parser.add_argument("-e", "--elastic_url", default="http://127.0.0.1:9200",
                              help="Host with elastic search (default: http://127.0.0.1:9200)")
          parser.add_argument("--elastic_url-enrich",
                              help="Host with elastic search and enriched indexes")
docs: Shared params in all backends