Extended writer generation fails to compile with XPP3 and field of type `DOM`

[mykelalvis]

This line produces a ClassNotFound by default, as InputLocation (unqualified) does not exist within modello.

This seems only to be an issue when:

1. You're using XPP (Might be a problem in other instances, haven't checked).
2. You have a field of <type>DOM</type>
3. You are generating extended writers.

I'm unclear about what the extended writer does for me, so I've fallen back to the regular (not extended).