gtk/widget.go
func (v *Widget) SetMapped(mapped bool) {
	C.gtk_widget_set_can_focus(v.native(), gbool(mapped))
}
func (v *Widget) SetMapped(mapped bool) {
	C.gtk_widget_set_can_focus(v.native(), gbool(mapped))
}
// SetMapped is a wrapper around gtk_widget_set_mapped().