Synchronizer: Remove source/destination queue fields (#9)
Synchronizer: Remove source/destination queue fields (#9)

These fields are initialized only while `synchronize()` is being called. That makes them hard to deal with when using static analysis tools.

This PR refactors the fields away and passes the iterators around as method parameters instead. By slightly shifting responsibilities between methods, we can minimize the number of methods where these parameters need to be passed at all.
webfactory/content-mapping