code: def save_variation_for_experiment(self, experiment_id, variation_id):
      
  
      self.experiment_bucket_map.update({
        experiment_id: {
          self.VARIATION_ID_KEY: variation_id
        }
      })
docs: Helper method to save new experiment/variation as part of the user's profile.
  
      Args:
        experiment_id: ID for experiment for which the decision is to be stored.
        variation_id: ID for variation that the user saw.