protected function updateCategoryRelation(ImportableSyncableItemInterface $item, string $category_id): void 	{ 		/** 		 * @var \App\Models\Product $item 		 */ 		if ($item->hasVatSet()) { 			$item->productCategories()->updateOrCreate(['category_id' => $category_id], ['category_id' => $category_id]); 		} else { 			$item->productCategories()->updateOrCreate(['category_id' => $category_id], ['category_id' => $category_id, 'vat' => true]); 		} 	}