/**
*
* Create a new discussion instance based on the required data.
*
* @param integer $categoryId
* @param integer $userId
* @param string $title
* @param string $body
* @return Discussion
*/
public function start($categoryId, $userId, $title, $body)
{
$discussion = new Discussion();
$discussion->categoryId = $categoryId;
$discussion->userId = $userId;
$discussion->title = $title;
$discussion->body = $body;
$discussion->raise(new DiscussionWasStarted($discussion));
return $discussion;
}
