docstr: Args:
    env: a RecSim gym environment
    value_fn: a function taking user & document feature,
      returning the value of the document for the user
code: def __init__(self, env, value_fn):
      """
      Args:
        env: a RecSim gym environment
        value_fn: a function taking user & document feature,
          returning the value of the document for the user
      """
      super().__init__(env)
      self.value_fn = value_fn
  
file_path: ReAgent/reagent/gym/envs/wrappers/recsim.py
imports: import copy
  import logging
  import gym
  import gym.spaces.dict
label_desc: Use image node_id 1 to create a new ValueWrapper object from inherited base classes: gym.core with example: obj = ValueWrapper(env, value_fn)