eZ\Bundle\EzPublishRestBundle\Features\Context\RestClient\DriverInterface::getHeader PHP Method

    public function getHeader($header);

 /**
  * @Then response header :header don't have :value (value)
  */
 public function assertHeaderDontHaveValue($header, $value)
 {
     Assertion::assertNotEquals($value, $this->restDriver->getResponseHeader($header), "Unexpected '{$header}' header found with '{$this->restDriver->getHeader($header)}' value");
 }