Last modified: 2014-11-16 02:44:25 UTC
Currently core has methods in the Page object for undeletion (Page.markDeletedRevision and Page.undelete), which invoke method Site.undelete() which does not exist.
Change 172116 had a related patch set uploaded by John Vandenberg: Mark page.undelete as not implemented. https://gerrit.wikimedia.org/r/172116
This is only a major significance as the code currently calls a missing function, which is very unclean. undelete is not a critical function for most users.
Change 172116 merged by jenkins-bot: Mark page.undelete as not implemented. https://gerrit.wikimedia.org/r/172116