private static boolean allDecoratorsAreKnown(@NotNull PyDecoratable element, @NotNull List<KnownDecorator> decorators) {
    final PyDecoratorList decoratorList = element.getDecoratorList();
    return decoratorList == null
           ? decorators.isEmpty()
           : decoratorList.getDecorators().length == StreamEx.of(decorators).groupingBy(KnownDecorator::getShortName).size();
  }
private static boolean allDecoratorsAreKnown(@NotNull PyDecoratable element, @NotNull List<KnownDecorator> decorators)