code: def encoder(self) -> _typing.Optional[torch.nn.Module]:
      return self._encoder
  
file_path: AutoGL/autogl/module/model/encoders/base_encoder.py
imports: import torch
  import typing
  from ...hpo import AutoModule
label_desc: Use image node_id 2 for calling the BaseEncoderMaintainer obj's underlying member method code with example usage: obj.encoder() and returns: self