func (v *Assistant) PrependPage(page IWidget) int {
	c := C.gtk_assistant_prepend_page(v.native(), page.toWidget())
	return int(c)
}
func (v *Assistant) PrependPage(page IWidget) int {
	c := C.gtk_assistant_prepend_page(v.native(), page.toWidget())
	return int(c)
}
// PrependPage is a wrapper around gtk_assistant_prepend_page().