code: def _reset_env(self, env: BaseUnityEnvironment):
          
          if self.meta_curriculum is not None:
              return env.reset(train_mode=self.fast_simulation, config=self.meta_curriculum.get_config())
          else:
              return env.reset(train_mode=self.fast_simulation)
docs: Resets the environment.
  
          Returns:
              A Data structure corresponding to the initial reset state of the
              environment.