Desrialize a page setup from an a{sv} variant in the format produced by gtk_page_setup_to_gvariant().
an a{sv} #GVariant
a new #GtkPageSetup object
ConstructionException GTK+ fails to create the object.
3.22
See Implementation
Desrialize a page setup from an a{sv} variant in the format produced by gtk_page_setup_to_gvariant().