code: protected function getRedirectForm( \Omnipay\Common\Message\RedirectResponseInterface $response )
  	{
  		$list = [];
  
  		foreach( (array) $response->getRedirectData() as $key => $value )
  		{
  			$list[$key] = new \Aimeos\MW\Criteria\Attribute\Standard( array(
  				'label' => $key,
  				'code' => $key,
  				'type' => 'string',
  				'internalcode' => $key,
  				'internaltype' => 'string',
  				'default' => $value,
  				'public' => false,
  			) );
  		}
  
  		$url = $response->getRedirectUrl();
  		$method = $response->getRedirectMethod();
  
  		return new \Aimeos\MShop\Common\Helper\Form\Standard( $url, $method, $list );
  	}
docs: Returns the form for redirecting customers to the payment gateway.
  
  @param \Omnipay\Common\Message\RedirectResponseInterface $response Omnipay response object
  @return \Aimeos\MShop\Common\Helper\Form\Iface Form helper object