code: def serialize(self):
      # TODO (Kourosh): Implement when needed.
      raise NotImplementedError
  
imports: from typing import Any, Mapping
  from ray.rllib.policy.sample_batch import SampleBatch
  from ray.rllib.core.rl_module.rl_module import RLModule, RLModuleConfig
  from ray.rllib.models.torch.torch_distributions import TorchCategorical
  from ray.rllib.core.rl_module.marl_module import MultiAgentRLModuleConfig, MultiAgentRLModule
  from ray.rllib.core.rl_module.torch.torch_rl_module import TorchRLModule
  from ray.rllib.core.models.specs.typing import SpecType
  from ray.rllib.utils.annotations import override
  from ray.rllib.utils.framework import try_import_torch
  from ray.rllib.utils.nested_dict import NestedDict
label_desc: Use image node_id 3 for calling the BCTorchMultiAgentModuleWithSharedEncoder obj's underlying member method code with example usage: obj.serialize() without return types