Sylius\Behat\Page\Admin\Customer\CreatePageInterface::specifyBirthday PHP 메소드

    public function specifyBirthday($birthday);

 /**
  * @When I specify its birthday as :birthday
  */
 public function iSpecifyItsBirthdayAs($birthday)
 {
     $this->createPage->specifyBirthday($birthday);
 }