5.3.4.4 Parameter

factory_id
A NULL-terminated string that contains a value that is used to identify the registered factory object to be found.
The value of the factory_id parameter is used as the value of the id field of a NameComponent that has a kind field with the value “FactoryInterface” when comparing against registered references for factory objects.

Parent topic: Tobj::FactoryFinder::find_factories_by_id