code: def _is_r2c2_format(cls, memory_text: str) -> bool:
      return (
          ":" in memory_text
          and memory_text.startswith("your persona")
          or memory_text.startswith("partner's persona")
      )
  
imports: import aiohttp
  import asyncio
  from enum import Enum
  import json
  import math
  from nltk.corpus import stopwords
  from nltk.tokenize import word_tokenize
  from nltk.stem import PorterStemmer
  import os
  import random
  import string
  import time
  from typing import List, Tuple, Optional, Dict, Any, Set, Union
  from parlai.agents.ir_baseline.ir_baseline import score_match, MaxPriorityQueue
  from parlai.core.dict import DictionaryAgent
  from parlai.core.message import Message
  from parlai.core.metrics import F1Metric
  from parlai.core.torch_generator_agent import PPLMetric
  import parlai.utils.logging
  import projects.bb3.constants
  import projects.bb3.prompts
  from projects.bb3.agents.module import Module
label_desc: Use image node_id 2 for calling the MemoryUtils obj's underlying member method code with example usage: obj._is_r2c2_format(cls, memory_text) and returns: unknown