code: def add_cmdline_args(
      cls, parser: ParlaiParser, partial_opt: Optional[Opt] = None
  ) -> ParlaiParser:
      super().add_cmdline_args(parser, partial_opt)
      parser = parser.add_argument_group("BST SelfChat World")
      parser.add_argument(
          "--include-personas",
          type="bool",
          default=True,
          help="Include personas as input context, or not",
      )
      parser.add_argument(
          "--include-initial-utterances",
          type="bool",
          default=True,
          help="Include context conversation at beginning or not",
      )
      return parser
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  import json
  import random
  from parlai.tasks.blended_skill_talk.agents import raw_data_path, safe_personas_path
  from parlai.tasks.interactive.worlds import InteractiveWorld
  from parlai.tasks.self_chat.worlds import SelfChatWorld
  from parlai.utils.io import PathManager
label_desc: Use image node_id 1 for calling the SelfChatWorld obj's underlying member method code with example usage: obj.add_cmdline_args(cls, parser, partial_opt) and returns: parser