[xwiki-devs] undeleting a document programmatically?

Dear XWiki experts, I've been trying to undelete documents programmatically and I must say I failed thus far. I need to do this so as to implement the undeletion of 450 documents. Given the full name of the document, which currently shows when /view/-ed, that it has been deleted and offers me to restore or really delete, I am calling: xwiki.getDeletedDocuments(fullName, "en"); however, thus far, the result of this call has been an array of size zero. I would have expected to call the undelete method on the last of these DeletedDocuments. Is this not the right way to act? thanks in advance. Paul