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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _reset_env(self, env: BaseUnityEnvironment):
 """Resets the environment. Returns: A Data structure corresponding to the initial reset state of the environment. """

        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)