code: def state_action_value(self, state: State, action: Action) -> float:
      return 0.0
  
imports: import pickle
  from functools import reduce
  from typing import List, Mapping, Sequence
  import torch
  from reagent.ope.estimators.sequential_estimators import Model, RLPolicy, State, ValueFunction
  from reagent.ope.estimators.types import Action, ActionDistribution, ActionSpace
  from reagent.ope.test.envs import Environment, PolicyLogGenerator
  from reagent.ope.utils import RunningAverage
label_desc: Use image node_id 3 for calling the EstimatedStateValueFunction obj's underlying member method code with example usage: obj.state_action_value(state, action) and returns: int