Switch between workspaces by name

Hello!

How can I switch workspace by name? I've searched in the mailing list
and I found this:

http://article.gmane.org/gmane.comp.window-managers.ion.general/1327/

In this there are a few patch and there is a function "bool
switch_workspace_name(const char *str)". The mail and the patch is
very-very old (from year 2001).

So, in Ion3 how can I do it?

Thanks.
 Zsolt