static GazelleLine dm_discord_lastEvalByUser(long userID) {
  L<GazelleLine> lines = lazyMap dm_discord_importLine(dm_discord_linesByUser_unimported(userID));
  for i, GazelleLine line backwards over lines: {
    if (swicOneOf(line.text, "!eval", "!fresh", "!real-eval"))
      ret line;
  }
  null;
}