private function renderColumns(DiffusionRequest $drequest, array $handles, PhabricatorRepositoryCommit $commit = null, $lint = null)
 {
     assert_instances_of($handles, 'PhabricatorObjectHandle');
     $viewer = $this->getRequest()->getUser();
     if ($commit) {
         $epoch = $commit->getEpoch();
         $modified = DiffusionView::linkCommit($drequest->getRepository(), $commit->getCommitIdentifier());
         $date = phabricator_date($epoch, $viewer);
         $time = phabricator_time($epoch, $viewer);
     } else {
         $modified = '';
         $date = '';
         $time = '';
     }
     $data = $commit->getCommitData();
     if ($data) {
         $author_phid = $data->getCommitDetail('authorPHID');
         if ($author_phid && isset($handles[$author_phid])) {
             $author = $handles[$author_phid]->renderLink();
         } else {
             $author = DiffusionView::renderName($data->getAuthorName());
         }
         $committer = $data->getCommitDetail('committer');
         if ($committer) {
             $committer_phid = $data->getCommitDetail('committerPHID');
             if ($committer_phid && isset($handles[$committer_phid])) {
                 $committer = $handles[$committer_phid]->renderLink();
             } else {
                 $committer = DiffusionView::renderName($committer);
             }
             if ($author != $committer) {
                 $author = hsprintf('%s/%s', $author, $committer);
             }
         }
         $details = AphrontTableView::renderSingleDisplayLine($data->getSummary());
     } else {
         $author = '';
         $details = '';
     }
     $return = array('commit' => $modified, 'date' => $date, 'time' => $time, 'author' => $author, 'details' => $details);
     if ($lint !== null) {
         $return['lint'] = phutil_tag('a', array('href' => $drequest->generateURI(array('action' => 'lint', 'lint' => null))), number_format($lint));
     }
     // The client treats these results as markup, so make sure they have been
     // escaped correctly.
     foreach ($return as $key => $value) {
         $return[$key] = hsprintf('%s', $value);
     }
     return $return;
 }