protected function resize(Thumbnail $thumbnail, PersistentResource $resource)
{
$adjustments = array(new ResizeImageAdjustment(array('width' => $thumbnail->getConfigurationValue('width'), 'maximumWidth' => $thumbnail->getConfigurationValue('maximumWidth'), 'height' => $thumbnail->getConfigurationValue('height'), 'maximumHeight' => $thumbnail->getConfigurationValue('maximumHeight'), 'ratioMode' => $thumbnail->getConfigurationValue('ratioMode'), 'allowUpScaling' => $thumbnail->getConfigurationValue('allowUpScaling'))));
return $this->imageService->processImage($resource, $adjustments);
}