static new ThreadLocal<S> dm_gazelle_addRuleWithComment_msg;

// returns (ruleID, isNew)
static Pair<S, Bool> dm_gazelle_addRuleWithComment(S text, S comment) {
  Pair<S, Bool> p = cast quickImport(dm_call(dm_gazelle_rulesModule(), 'addRuleWithComment, text, comment));
  infoBox(setTLAndReturn(dm_gazelle_addRuleWithComment_msg, p.b ? "Rule " + p.a + " added" : "Rule already there: " + p.a));
  ret p;
}

static Pair<S, Bool> dm_gazelle_addRuleWithComment(S when, S then, S comment) {
  ret dm_gazelle_addRuleWithComment(when + "\n=> " + then, comment);
}