class_docstr: Base class for continuous actor net builder.
class_docstr_tok: ["Base","class","for","continuous","actor","net","builder","."]
code: def default_action_preprocessing(self) -> str:
      pass
  
file_path: ReAgent/reagent/net_builder/continuous_actor_net_builder.py
imports: import abc
  import reagent.core.types
  import torch
  from reagent.core.fb_checker import IS_FB_ENVIRONMENT
  from reagent.core.parameters import NormalizationData
  from reagent.models.base import ModelBase
  from reagent.prediction.predictor_wrapper import ActorWithPreprocessor, RankingActorWithPreprocessor
  from reagent.preprocessing.postprocessor import Postprocessor
  from reagent.preprocessing.preprocessor import Preprocessor
label_desc: Use image node_id 1 for calling the ContinuousActorNetBuilder obj's underlying member method code with example usage: obj.default_action_preprocessing() without return types