sclass ExecutedRule {
  RuleWithParams rule; // may be a FailedRule
  LS output;
  LS facts;
  LS newInput;
  transient NLLogicChecker_v2 logicChecker; // logic checker used
  
  int _failureLevel; // or 0
  
  *() {}
  *(RuleWithParams *rule, Collection<S> output, Collection<S> facts, Collection<S> newInput) {
    this.output = asList_nullIfEmpty(output);
    this.facts = asList_nullIfEmpty(facts);
    this.newInput = asList_nullIfEmpty(newInput);
  }
  
  int failureLevel() {
    if (_failureLevel != 0) ret _failureLevel;
    if (rule instanceof FailedRule)
      _failureLevel = nlLogic_failureLevel_calc(this);
    ret _failureLevel;
  }
  
  S ruleID() { ret rule.ruleID(); }
  
  bool isFailed() { ret rule instanceof FailedRule; }
}