This allows adding `__attribute__((swift_name("MyNamespace.MyType.my_method()")))` on standalone C++ functions to make Swift import them as member functions of a type that is nested in a C++ namespace.
rdar://138934888
This allows adding `__attribute__((swift_name("MyNamespace.MyType.my_method()")))` on standalone C++ functions to make Swift import them as member functions of a type that is nested in a C++ namespace.
rdar://138934888