/**
* Fetch thread messages for user
*
* @param string $userId
* @param mixed[] $conditions
*
* @return CursorInterface|MessageInstanceInterface[]
*/
public function fetchMessagesFor($userId, array $conditions = [])
{
$conditions[Field::CHAN_ID] = $this->channel->getId();
$conditions[Field::SUBER_NAME] = $this->service->getUserSubscriberId($userId);
return $this->channel->fetch($conditions);
}