code: def iex_user_model_creator(env_ctx):
      return iex.IEUserModel(
          env_ctx["slate_size"],
          user_state_ctor=iex.IEUserState,
          response_model_ctor=iex.IEResponse,
          seed=env_ctx["seed"],
      )
  
file_path: ray/python/ray/rllib/examples/env/recommender_system_envs_with_recsim.py
imports: from recsim import choice_model
  from recsim.environments import long_term_satisfaction, interest_evolution, interest_exploration
  from ray.rllib.env.wrappers.recsim import make_recsim_env
  from ray.tune import register_env
label_desc: Use image node_id 3 for calling a global function with example usage: iex_user_model_creator(env_ctx) and returns: iex