code: def process_rewards(self, rewards):
      
  
      min_reward, max_reward = self.reward_range
  
      # Clips at min and max reward.
      rewards = np.clip(rewards, min_reward, max_reward)
      # Round to (nearest) int and convert to integral type.
      rewards = np.around(rewards, decimals=0).astype(np.int64)
      return rewards
docs: Clips, rounds, and changes to integer type.
  
      Args:
        rewards: numpy array of raw (float) rewards.
  
      Returns:
        processed_rewards: numpy array of np.int64