public static function getEmptyBlames($user)
    {
        $blames = static::getAllBlames($user);
        $emptyGroups = [];
        $noInit = static::buildNoInitModel();
        foreach ($blames as $blame) {
            if (static::find()->createdBy($user)->
                    andWhere(['like', $noInit->multiBlamesAttribute, $blame->getGUID()])->exists()) {
                continue;
            }
            $emptyGroups[] = $blame;
        }
        return $emptyGroups;
    }