Ouzo\Db\Query::addUsing PHP Метод

    public function addUsing(JoinClause $usingClause)
    {
        $this->usingClauses[] = $usingClause;
        return $this;
    }

 /**
  * @param $relationSelector - Relation object, relation name or nested relations 'rel1->rel2'
  * @param null $aliases - alias of the first joined table or array of aliases for nested joins
  * @return ModelQueryBuilder
  */
 public function using($relationSelector, $aliases)
 {
     $modelJoins = $this->createModelJoins($relationSelector, $aliases, 'USING', array());
     foreach ($modelJoins as $modelJoin) {
         $this->_query->addUsing($modelJoin->asJoinClause());
     }
     return $this;
 }