class_docstr: Example of interpreting repeated observations.
class_docstr_tok: ["Example","of","interpreting","repeated","observations","."]
code: def value_function(self):
      return self.model.value_function()
  
file_path: ray/python/ray/rllib/examples/models/simple_rpg_model.py
imports: from ray.rllib.models.tf.tf_modelv2 import TFModelV2
  from ray.rllib.models.tf.fcnet import FullyConnectedNetwork
  from ray.rllib.models.torch.torch_modelv2 import TorchModelV2
  from ray.rllib.models.torch.fcnet import FullyConnectedNetwork
  from ray.rllib.utils.framework import try_import_tf, try_import_torch
label_desc: Use image node_id 3 for calling the CustomTFRPGModel obj's underlying member method code with example usage: obj.value_function() and returns: self