jednoduchý setValidationScope(false)

Ahoj,

používám 3.0 nette a vytvářím formulář v komponentě dle dokumentace a chci vypnout validaci viz. níže …

    protected function createComponentStep2()
    {	// Nette\Application\UI\Form
        $form = $this->formFactory->create();
        $form->addText('name')->setRequired();

        $details = $form->addContainer('details');
        $details->addInteger('age')->setRequired('age');
        $details->addInteger('age2')->setRequired('age2');

        $form->addSubmit('send1'); // Validates the whole form
        $form->addSubmit('send2')->setValidationScope(false); // Validates nothing
        $form->addSubmit('send3')->setValidationScope([$form['name']]); // Validates only 'name' input
        $form->addSubmit('send4')->setValidationScope([$form['details']['age']]); // Validates only 'age' input
        $form->addSubmit('send5')->setValidationScope([$form['details']]); // Validates 'details' container

        return $form;
    }

Nette hlásí chybu – dle dokumentace předávám false: Argument 1 passed to Nette\Forms\Controls\SubmitButton::setValidationScope() must be iterable or null, boolean given

Ještě přidávám setValidationScope z Nette\Forms\Controls\SubmitButton níže …

	/**
	 * Sets the validation scope. Clicking the button validates only the controls within the specified scope.
	 * @return static
	 */
	public function setValidationScope(?iterable $scope)
	{
		if ($scope === null || $scope === true) {
			$this->validationScope = null;
		} else {
			$this->validationScope = [];
			foreach ($scope ?: [] as $control) {
				if (!$control instanceof Nette\Forms\Container && !$control instanceof Nette\Forms\IControl) {
					throw new Nette\InvalidArgumentException('Validation scope accepts only Nette\Forms\Container or Nette\Forms\IControl instances.');
				}
				$this->validationScope[] = $control;
			}
		}
		return $this;
	}

Co jsem prosím přehlédl? Děkuju za pomoc.