code: def create(model_config, model, vec_env, algo, env_roller,
             parallel_envs, number_of_steps,
             experience_replay=1, stochastic_experience_replay=True):
      
      settings = BufferedMixedPolicyIterationReinforcerSettings(
          experience_replay=experience_replay,
          stochastic_experience_replay=stochastic_experience_replay,
          number_of_steps=number_of_steps
      )
  
      return BufferedMixedPolicyIterationReinforcerFactory(
          settings,
          env_factory=vec_env,
          model_factory=model,
          parallel_envs=parallel_envs,
          env_roller_factory=env_roller,
          algo=algo,
          seed=model_config.seed
      )
docs: Vel factory function