code: def get_external_id(self, submission_id):
      
      submission = self.find_by_id(submission_id)
      if not submission:
        return None
      if 'team_id' in submission.participant_id:
        return submission.participant_id['team_id']
      elif 'baseline_id' in submission.participant_id:
        return 'baseline_' + submission.participant_id['baseline_id']
      else:
        return ''
docs: Returns human readable submission external ID.
  
      Args:
        submission_id: internal submission ID.
  
      Returns:
        human readable ID.