code: def decoder(self) -> _typing.Optional[torch.nn.Module]:
      return self._decoder
  
file_path: AutoGL/autogl/module/model/decoders/base_decoder.py
imports: import torch
  import typing
  from ...hpo import AutoModule
  from ..encoders import base_encoder
label_desc: Use image node_id 6 for calling the BaseDecoderMaintainer obj's underlying member method code with example usage: obj.decoder() and returns: self