private function commentNeedsNotification($comment, $user)
 {
     if ($comment['updated_at'] < $user['created_at']) {
         return false;
     }
     return NotifiedComment::where('github_id', $comment['id'])->where('github_updated_at', $comment['updated_at'])->count() == 0;
 }
 private function commentNoLongerNeedsNotification()
 {
     return NotifiedComment::where('github_id', $this->comment['id'])->where('github_updated_at', $this->comment['updated_at'])->count() > 0;
 }