code: def __call__(
      self,
      params: networks_lib.Params,
      observation: networks_lib.Observation,
      *args,
      is_training: bool,
      key: Optional[types.PRNGKey] = None,
      **kwargs,
  ) -> networks_lib.NetworkOutput:
      ...
  
file_path: acme/acme/agents/jax/bc/networks.py
imports: import dataclasses
  from typing import Callable, Optional
  from acme.jax import networks
  from acme.jax import types
  from typing_extensions import Protocol
label_desc: Use image node_id 1 for calling the ApplyFn obj's underlying member method code with example usage: obj.__call__(params, observation) without return types