code: def input_dimension(self) -> _typing.Optional[int]:
      return self._input_dimension
  
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 3 for calling the AutoHomogeneousEncoderMaintainer obj's underlying member method code with example usage: obj.input_dimension() and returns: self