void gazelle_gatherFulfillments(L<GazelleLine> lines, L<GazelleFulfillment> list_out, O... _) {
  Int maxEntries = cast optPar maxEntries(_);
  Flag cancel = cast optPar cancel(_);
  GazelleEvalContext ctx = cast optPar ctx(_);
  if (ctx == null) ctx = dm_gazelle_stdEvalContext(dm_gazelle_rulesOnFacts());
  
 for (GazelleLine line : lines) pcall {
    for (GazelleTree t : gazelle_getChildren(GazelleTree(ctx, line.text))) pcall {
      if (flagIsUp(cancel) || maxEntries != null && l(list_out) >= maxEntries) ret with print("Cancel");
      list_out.add(nu GazelleFulfillment(
        line := t.parent.line,
        varMap := struct(t.varMap()),
        rule := t.ruleID(),
        matchedRuleStruct := struct(t.mr),
        context := "discord msg " + line.msgID));
    }
  }
}