In Nautilus 43, NautilusFile is no longer available (in the past, NautilusFileInfo was its alias).
Similarly, the old names of interfaces that were renamed to use Interface suffix instead of Iface will not be available in Nautilus 43.
In Nautilus 43, NautilusFile is no longer available (in the past, NautilusFileInfo was its alias).
Similarly, the old names of interfaces that were renamed to use Interface suffix instead of Iface will not be available in Nautilus 43.