gtk/print.go
func (ps *PageSetup) GetPaperHeight(unit Unit) float64 {
	c := C.gtk_page_setup_get_paper_height(ps.native(), C.GtkUnit(unit))
	return float64(c)
}
func (ps *PageSetup) GetPaperHeight(unit Unit) float64 {
	c := C.gtk_page_setup_get_paper_height(ps.native(), C.GtkUnit(unit))
	return float64(c)
}
// GetPaperHeight() is a wrapper around gtk_page_setup_get_paper_height().