code: func PaperSizeNewFromPPD(name, displayName string, width, height float64) (*PaperSize, error) {
  	cName := C.CString(name)
  	defer C.free(unsafe.Pointer(cName))
  	cDisplayName := C.CString(displayName)
  	defer C.free(unsafe.Pointer(cDisplayName))
  	c := C.gtk_paper_size_new_from_ppd((*C.gchar)(cName), (*C.gchar)(cDisplayName),
  		C.gdouble(width), C.gdouble(height))
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	t := &PaperSize{c}
  	runtime.SetFinalizer(t, (*PaperSize).free)
  	return t, nil
  }
docs: // PaperSizeNewFromPPD() is a wrapper around gtk_paper_size_new_from_ppd().