code: func (ps *PageSetup) GetPaperSize() *PaperSize {
  	c := C.gtk_page_setup_get_paper_size(ps.native())
  	p := &PaperSize{c}
  	runtime.SetFinalizer(p, (*PaperSize).free)
  	return p
  }
docs: // GetPaperSize() is a wrapper around gtk_page_setup_get_paper_size().