Again this is stolen from translate/storage/properties.py, where
getsource does not return source, but a value...

Currently translated at 92.8% (725 of 781)

Currently translated at 99.2% (775 of 781)

Currently translated at 98.7% (771 of 781)

Currently translated at 87.2% (681 of 781)

Currently translated at 98.6% (770 of 781)

Currently translated at 97.3% (760 of 781)

Currently translated at 100.0% (16 of 16)

Currently translated at 100.0% (781 of 781)

Explicitely passing language and flags is not needed as it is anyway
part of Unit object and most of checks do not use this information.

Various filtering should be done at user place as these will be
different anyway for each purpose.