code: def output_specs_train(self) -> List[str]:
      return [
          SampleBatch.ACTION_DIST_INPUTS,
          OLD_ACTION_DIST_LOGITS_KEY,
          SampleBatch.VF_PREDS,
      ]
  
file_path: ray/python/ray/rllib/algorithms/appo/torch/appo_torch_rl_module.py
imports: from typing import List
  from ray.rllib.algorithms.appo.appo import OLD_ACTION_DIST_LOGITS_KEY
  from ray.rllib.algorithms.ppo.torch.ppo_torch_rl_module import PPOTorchRLModule
  from ray.rllib.core.models.base import ACTOR
  from ray.rllib.core.models.tf.encoder import ENCODER_OUT
  from ray.rllib.core.rl_module.rl_module_with_target_networks_interface import RLModuleWithTargetNetworksInterface
  from ray.rllib.policy.sample_batch import SampleBatch
  from ray.rllib.utils.annotations import override
  from ray.rllib.utils.nested_dict import NestedDict
label_desc: Use image node_id 3 for calling the APPOTorchRLModule obj's underlying member method code with example usage: obj.output_specs_train() and returns: list