Sylius\Behat\Page\Shop\Checkout\SelectShippingPageInterface::isNextStepButtonUnavailable PHP Method

    public function isNextStepButtonUnavailable();

 /**
  * @Then I should not be able to complete the shipping step
  */
 public function iShouldNotBeAbleToCompleteTheShippingStep()
 {
     Assert::true($this->selectShippingPage->isNextStepButtonUnavailable(), 'The next step button should be disabled, but it does not.');
 }