Sylius\Behat\Page\Admin\Customer\CreatePageInterface::specifyLastName PHP Method

    public function specifyLastName($name);

 /**
  * @When /^I specify (?:their|his) last name as "([^"]*)"$/
  */
 public function iSpecifyItsLastNameAs($name)
 {
     $this->createPage->specifyLastName($name);
 }