code: def last_in_prompt(self) -> Self:
      return RequestBatch(
          [r for r in self.requests if r.last_in_prompt]
      )
  
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 9 for calling the RequestBatch obj's underlying member method code with example usage: obj.last_in_prompt() and returns: RequestBatch