code: def get_stored_variation(self, experiment, user_profile):
      
  
      user_id = user_profile.user_id
      variation_id = user_profile.get_variation_for_experiment(experiment.id)
  
      if variation_id:
        variation = self.config.get_variation_from_id(experiment.key, variation_id)
        if variation:
          self.logger.info('Found a stored decision. User "%s" is in variation "%s" of experiment "%s".' % (
            user_id,
            variation.key,
            experiment.key
          ))
          return variation
  
      return None
docs: Determine if the user has a stored variation available for the given experiment and return that.
  
      Args:
        experiment: Object representing the experiment for which user is to be bucketed.
        user_profile: UserProfile object representing the user's profile.
  
      Returns:
        Variation if available. None otherwise.