code: public void undelete(CmsUUID entryId, String sitePath) {
  
          CmsSitemapChange change = new CmsSitemapChange(entryId, sitePath, ChangeType.undelete);
          CmsSitemapClipboardData data = CmsSitemapView.getInstance().getController().getData().getClipboardData().copy();
          data.getDeletions().remove(entryId);
          change.setClipBoardData(data);
          commitChange(change, null);
      }
docs: Undeletes the resource with the given structure id.<p>
  
  @param entryId the entry id
  @param sitePath the site-path