How to use the fleetspeak.src.server.proto.fleetspeak_server.admin_pb2 function in fleetspeak

def UpdateClientsFromFleetspeak(clients):
  """Updates ApiClient records to include info from Fleetspeak."""
  if not fleetspeak_connector.CONN or not fleetspeak_connector.CONN.outgoing:
    # FS not configured, or an outgoing connection is otherwise unavailable.
    return
  id_map = {}
  for client in clients:
    if client.fleetspeak_enabled:
      id_map[fleetspeak_utils.GRRIDToFleetspeakID(client.client_id)] = client
  if not id_map:
    return
  res = fleetspeak_connector.CONN.outgoing.ListClients(
      admin_pb2.ListClientsRequest(client_ids=list(iterkeys(id_map))))
  for read in res.clients:
    api_client = id_map[read.client_id]
    api_client.last_seen_at = fleetspeak_utils.TSToRDFDatetime(
        read.last_contact_time)
    api_client.last_clock = fleetspeak_utils.TSToRDFDatetime(read.last_clock)

def _GetAddrFromFleetspeak(client_id):
  res = fleetspeak_connector.CONN.outgoing.ListClients(
      admin_pb2.ListClientsRequest(
          client_ids=[fleetspeak_utils.GRRIDToFleetspeakID(client_id)]))
  if not res.clients or not res.clients[0].last_contact_address:
    return "", None
  # last_contact_address typically includes a port
  parsed = urlparse.urlparse("//{}".format(res.clients[0].last_contact_address))
  ip_str = parsed.hostname
  return ip_str, ipaddress.ip_address(ip_str)

def GetLabelsFromFleetspeak(client_id):
  """Returns labels for a Fleetspeak-enabled client.

  Fleetspeak-enabled clients delegate labeling to Fleetspeak, as opposed to
  using labels in the GRR config.

  Args:
    client_id: Id of the client to fetch Fleetspeak labels for.

  Returns:
    A list of client labels.
  """
  res = fleetspeak_connector.CONN.outgoing.ListClients(
      admin_pb2.ListClientsRequest(client_ids=[GRRIDToFleetspeakID(client_id)]))
  if not res.clients or not res.clients[0].labels:
    return []

  grr_labels = []
  label_prefix = config.CONFIG["Server.fleetspeak_label_prefix"]
  for fs_label in res.clients[0].labels:
    if (fs_label.service_name != "client" or
        (label_prefix and not fs_label.label.startswith(label_prefix))):
      continue
    try:
      grr_labels.append(fleetspeak_connector.label_map[fs_label.label])
    except KeyError:
      grr_labels.append(fs_label.label)

  return grr_labels