code: def fetch_submissions(self, submissions_callback, *args):
          
          logger.debug('Fetching submissions')
  
          submissions_callback(*args)
  
          logger.info('Found {} submissions'.format(len(self.submissions)))
          if not self.submissions:
              return
  
          self.min_date = min(x.created_utc for x in self.submissions.values())
          self.max_date = max(x.created_utc for x in self.submissions.values())
  
          self.process_submitters()
          self.process_commenters()
docs: Wrap the submissions_callback function.