private Set<StdArrangementRuleAliasToken> cloneTokenDefinitions() {
    final Set<StdArrangementRuleAliasToken> definitions = new HashSet<>();
    for (StdArrangementRuleAliasToken definition : myRulesAliases) {
      definitions.add(definition.clone());
    }
    return definitions;
  }
private Set<StdArrangementRuleAliasToken> cloneTokenDefinitions()