Phirehose::setFollow PHP Method

    public function setFollow($userIds)
    {
        $userIds = $userIds === NULL ? array() : $userIds;
        sort($userIds);
        // Non-optimal but necessary
        if ($this->followIds != $userIds) {
            $this->filterChanged = TRUE;
        }
        $this->followIds = $userIds;
    }