def _WritePlainResponse(response, values, unused_title):
  content = ''.join(vars_export.GetPairPlain(key, values[key])
                    for key in values)
  if len(values) == 1:
    value = content.split(' ', 1)[1]
    if not value.startswith('map:'):
      content = value
  response.headers.add_header('Content-Type', 'text/plain; charset=UTF-8')
  response.start_response(200)
  response.out.write(content)
  response.end_response()
List the groups that a specified user belongs to.
dataset/ETHPy150Open google/mysql-tools/pylib/http_handlers.py/_WritePlainResponse--crossover with--dataset/ETHPy150Open darcyliu/storyboard/boto/iam/connection.py/IAMConnection.get_groups_for_user