Retrieve Regress::TestObj's list and hash_table fields with accessors.
Retrieve Regress::TestObj's list and hash_table fields with accessors.

The type of these fields is under-defined, so they still need to be cast
to the correct list and hash table types.

mvz/gir_ffi,mvz/gir_ffi,mvz/gir_ffi,jcupitt/gir_ffi,jcupitt/gir_ffi