svoid dm_discord_gatherFeedbackFromLine(GazelleLine l) pcall {
  S mrStruct = gazelle_discord_matchedRuleStructForMsgID(l.msgID);
  if (mrStruct == null) ret; // with print("Not a Gazelle line or legacy");
  print("Processing: " + l.msgID + " - " + l.text);
  printIndent(shorten(mrStruct, 50));
  printIndent(l.reactions);
  LS posNeg = uniquifyCI(map dm_posNegStringForEmoji(collectStrings emoji(l.reactions)));
  printIndent("posNeg = " + posNeg);
  if (l(posNeg) > 1) ret with warn("  Mixed feedback, skipping");
  S judgement = cic(posNeg, 'positive) ? 'good : 'bad;
  dm_gazelle_saveAppliedRule(
    +judgement,
    matchedRuleStruct := mrStruct,
    context := "discord msg " + l.msgID);
}