3 An Any is populated with a union whose member is not empty.
4 Call dynAny->from_any (Any);
5 to put the Any'd union into a DynAny object.
6 Call dynAny->to_any () : Any
7 to get the Any'd union from a DynAny object.
9 Repeat the process except this time, use a union whose member is empty,
10 ie, _default () has been called on the union.
12 from_any (Any) succeeded.
13 to_any () : Any failed.
15 to_any () needs to check for an empty union before adding its member