EntitiesChangesCollection::onlyCategoryChangedEntities

public function onlyCategoryChangedEntities(): self
{
	$result = new self();

	foreach ($this->values as $entityChange)
	{
		if (
			$entityChange->isCategoryIdChanged()
			&& !is_null($entityChange->getOldCategoryId())
		)
		{
			$result->add($entityChange);
		}
	}
	return $result;
}