public function getManufacturers(): ProductManufacturerCollection
{ return new ProductManufacturerCollection( $this->
fmap(fn (ProductEntity
$product) =>
$product->
getManufacturer()) );
} public function getUnits(): UnitCollection
{ return new UnitCollection( $this->
fmap(fn (ProductEntity
$product) =>
$product->
getUnit()) );
} /**
* @return list<string>
*/
public function getPriceIds(): array
{ $ids =
[[]];