#ifndef U_HIDE_INTERNAL_API
/**
- * @internal
* @param id the ID being registered
* @param factory a function pointer that will be copied and
* called later when the given ID is passed to createInstance()
* @param context a context pointer that will be stored and
* later passed to the factory function when an ID matching
* the registration ID is being instantiated with this factory.
+ * @internal
*/
static void _registerFactory(const UnicodeString& id,
Factory factory,