public function opposites($user, $others = [], $database = null)
    {
        $model = $this->noInitModel;
        $query = $this->andWhere([$model->otherGuidAttribute => BaseUserModel::compositeGUIDs($user)]);
        /* @var $query static */
        if (!empty($others)) {
            $query = $query->andWhere([$model->createdByAttribute => BaseUserModel::compositeGUIDs($others)]);
        }
        return $query->all($database);
    }