public @NotNull Collection<Set<ArrangementSettingsToken>> getMutexes() {
    if (myRuleAliasMutex.isEmpty()) {
      return myMutexes;
    }
    final List<Set<ArrangementSettingsToken>> allMutexes = new ArrayList<>(myMutexes);
    allMutexes.add(myRuleAliasMutex);
    return allMutexes;
  }
public @NotNull Collection<Set<ArrangementSettingsToken>> getMutexes()