code: def _slice_state(
      states: List[List[torch.Tensor]], idx: int, device: torch.device
  ) -> List[List[torch.Tensor]]:
      idx_tensor = torch.tensor([idx], device=device)
      return [
          [state.index_select(0, idx_tensor) for state in state_tuple]
          for state_tuple in states
      ]
  
imports: from typing import Callable, Dict, List, Optional, Tuple
  import torch
  from torchaudio.models import RNNT
label_desc: Use image node_id 7 for calling a global function with example usage: _slice_state(states, idx, device) and returns: unknown