Nonnull warnings removed for api.change
nonnull warnings removed for api.io
nonnull warnings remoed for api.model
nonnull warnings removed from api.profiles
moved transitive object property type to rbox
nonnull warnings for api.search
nonnull warnings removed from api.util
nonnull warnings removed for owlapi impl
more nonnull warnings removed for api
nonnull warnings removed for reasoner impl
another round of nonnull warnings removal