code: def __call__(
      self,
      networks: builders.Networks,
      environment_spec: specs.EnvironmentSpec,
  ) -> Dict[
      str, Callable[[core.VariableSource], types.ModelToSnapshot]
  ]:
      ...
  
imports: import dataclasses
  import datetime
  from typing import Any, Callable, Dict, Generic, Iterator, Optional, Sequence
  from acme import core
  from acme import environment_loop
  from acme import specs
  from acme.agents.jax import builders
  from acme.jax import types
  from acme.jax import utils
  from acme.utils import counting
  from acme.utils import loggers
  from acme.utils import observers
  from acme.utils import experiment_utils
  import jax
  from typing_extensions import Protocol
label_desc: Use image node_id 1 for calling the SnapshotModelFactory obj's underlying member method code with example usage: obj.__call__(networks, environment_spec) without return types