protected final void checkForEmptyAndDuplicatedNames(String prefix, String title,
                                                       Class<? extends NamedConfigurable<?>> configurableClass) throws ConfigurationException {
    checkForEmptyAndDuplicatedNames(myRoot, prefix, title, configurableClass, true);
  }
protected final void checkForEmptyAndDuplicatedNames(String prefix, String title,
                                                       Class<? extends NamedConfigurable<?>> configurableClass)