static L<dm_gazelle_appliedRulesForLearning_Entry> dm_gazelle_appliedRulesForLearning_withoutChangedRules() {
  Map<S, RuleEngine2.Rule> rules = dm_gazelle_rulesByID();
  L<dm_gazelle_appliedRulesForLearning_Entry> l = dm_gazelle_appliedRulesForLearning();
  new L<dm_gazelle_appliedRulesForLearning_Entry> out;
  for (dm_gazelle_appliedRulesForLearning_Entry e : l) {
    RuleEngine2.Rule rule = rules.get(e.ruleID);
    e.r.rule.vars = asCISet(e.r.rule.vars);
    S s1 = struct(rule), s2 = struct(e.r.rule);
    if (eq(s1, s2))
      out.add(e);
  }
  ret out;
}

Began life as a copy of #1021446