code: def end_experience_collection_timer(self):
          
          if self.time_start_experience_collection:
              curr_delta = time() - self.time_start_experience_collection
              if self.delta_last_experience_collection is None:
                  self.delta_last_experience_collection = curr_delta
              else:
                  self.delta_last_experience_collection += curr_delta
          self.time_start_experience_collection = None
docs: Inform Metrics class that experience collection is done.