class_docstr: Null encoder.
docstr: Forward.
  
  Args:
      input (torch.Tensor): mixed speech [Batch, sample]
      ilens (torch.Tensor): input lengths [Batch]
      fs (int): sampling rate in Hz (Not used)
docstr_tok: ["Forward",".","Args",":","input","(","torch.Tensor",")",":","mixed","speech","[","Batch",",","sample","]","ilens","(","torch.Tensor",")",":","input","lengths","[","Batch","]","fs","(","int",")",":","sampling","rate","in","Hz","(","Not","used",")"]
code: def forward(
      self, input: torch.Tensor, ilens: torch.Tensor, fs: int = None
  ):
      """Forward.
  
      Args:
          input (torch.Tensor): mixed speech [Batch, sample]
          ilens (torch.Tensor): input lengths [Batch]
          fs (int): sampling rate in Hz (Not used)
      """
      return input, ilens
  
imports: import torch
  from espnet2.enh.encoder.abs_encoder import AbsEncoder
label_desc: Use image node_id 3 for calling the NullEncoder obj's underlying member method code with example usage: obj.forward(input, ilens, fs) and returns: input,  ilens