argument to set_title not consistent

[Russel Winder]

For Window:

fn set_title(&self, title: &str)

for NativeDialog:

fn set_title(&self, title: &str)

but for HeaderBar:

fn set_title(&self, title: Option<&str>)

is the Option needed in this last case?

[Sebastian Dröge]

Yes, see the docs: https://developer.gnome.org/gtk3/stable/GtkHeaderBar.html#gtk-header-bar-set-title . It allows NULL.