code: def __contains__(self, r: Request) -> bool:
      return r in self.requests
  
imports: from dataclasses import dataclass, field, asdict
  from typing import Any, Dict, List, Iterator, Union
  from typing_extensions import Self
  import torch
  from mii.constants import GenerationFinishReason
  from mii.config import GenerateParamsConfig
label_desc: Use image node_id 3 for calling the RequestBatch obj's underlying member method code with example usage: obj.__contains__(r) and returns: unknown