(MessengerInclude::at(const Interface*)) : Treat unnamed properties as overloaded
Map [Constructor] to a static class function named 'construct' in the C++11
binding.  Note there can be an interface that takes the same interface type
as the only constructor argument, which cannot be distinguished from the C++
copy constructor.

(Messenger::at(const OpDcl*, const std::string&), MessengerInvoke::writeInvoke, MessengerInvoke::at(const OpDcl*)) : Refine