/**
* Get all categories that are not root
*
* @return string[]
*/
protected function getCategoryCodes()
{
if (null === $this->categoryCodes) {
$this->categoryCodes = [];
$categories = $this->categoryRepository->findAll();
foreach ($categories as $category) {
if (null !== $category->getParent()) {
$this->categoryCodes[] = $category->getCode();
}
}
}
return $this->categoryCodes;
}