/**
  * @param Workflow $topicList
  * @param Workflow $topic
  * @return TopicListEntry
  */
 public static function create(Workflow $topicList, Workflow $topic)
 {
     $obj = new self();
     $obj->topicListId = $topicList->getId();
     $obj->topicId = $topic->getId();
     $obj->topicWorkflowLastUpdated = $topic->getLastModified();
     return $obj;
 }