code: def _id(x):
      return x
  
file_path: ReAgent/reagent/gym/agents/agent.py
imports: from typing import Any, Dict, Optional, Tuple, Union
  import numpy
  import torch
  from reagent.gym.envs.env_wrapper import EnvWrapper
  from reagent.gym.policies.policy import Policy
  from reagent.gym.policies.random_policies import make_random_policy_for_env
  from reagent.gym.types import PostEpisode, PostStep, Trajectory, Transition
label_desc: Use image node_id 1 for calling a global function with example usage: _id(x) and returns: x