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