static ItIt<GazelleRevisitedLine> gazelle_revisitAllChatLines(final F0<GazelleEvalContext> contextMaker, fO... _) {
  ret nestedIterator(dm_discord_allChannelIDs(), func(long channelID) -> ItIt<GazelleRevisitedLine> {
    gazelle_revisitAllLinesInChannel(channelID, contextMaker, _)
  });
}