class_docstr: Decoder interface for Transducer models.
docstr: Initialize decoder states.
  
  Args:
      batch_size: Batch size.
  
  Returns:
      state: Initial decoder hidden states.
code: def init_state(
      self,
      batch_size: int,
  ) -> Union[
      Tuple[torch.Tensor, Optional[torch.Tensor]],
      List[Optional[torch.Tensor]],
  ]:
      """Initialize decoder states.
  
      Args:
          batch_size: Batch size.
  
      Returns:
          state: Initial decoder hidden states.
  
      """
      raise NotImplementedError("init_state(...) is not implemented")
  
file_path: espnet/espnet/nets/transducer_decoder_interface.py
imports: from dataclasses import dataclass
  from typing import Any, Dict, List, Optional, Tuple, Union
  import torch
label_desc: Use image node_id 1 for calling the TransducerDecoderInterface obj's underlying member method code with example usage: obj.init_state(batch_size) without return types