def MultiReadClientFullInfo(self, client_ids, min_last_ping=None):
    """Reads full client information for a list of clients."""
    res = {}
    for client_id in client_ids:
      try:
        md = self.ReadClientMetadata(client_id)
      except db.UnknownClientError:
        continue

      if md and min_last_ping and md.ping < min_last_ping:
        continue
      last_snapshot = self.ReadClientSnapshot(client_id)
      full_info = rdf_objects.ClientFullInfo(
          metadata=md,
          labels=self.ReadClientLabels(client_id),
          last_startup_info=self.ReadClientStartupInfo(client_id))
      if last_snapshot is None:
        full_info.last_snapshot = rdf_objects.ClientSnapshot(
            client_id=client_id)
      else:
        full_info.last_snapshot = last_snapshot
      res[client_id] = full_info
    return res