"You can't implement a trait for a type you didn't define"

HAH, I'll just define a new type that's just a wrapper for that type.

"Okay. But that means you have to write your own deserialization macros."

..oh. WELL I DID THAT.

"Sure, you did that for the string to the type. But did you do it for your wrapper too?"

I, uh, well.

"Oh, and the deserialization function has to be a member of trait Visitor. Which we only defined for default types"

...i'm gonna go be sad while I figure out how to implement that trait :(