def get_ids_to_query(self) -> Sequence[bytes]:
    N = 500
    l = list(self.unknown_ids)
    self.unknown_ids = set(l[N:])
    util.trigger_callback('unknown_channels', len(self.unknown_ids))
    util.trigger_callback('ln_gossip_sync_progress')
    return l[0:N]
def get_ids_to_query(self) -> Sequence[bytes]:
    N = 500
    l = list(self.unknown_ids)
    self.unknown_ids = set(l[N:])
    util.trigger_callback('unknown_channels', len(self.unknown_ids))
    util.trigger_callback('ln_gossip_sync_progress')
    return l[0:N]