Nextras\Orm\Mapper\IMapper::getStorageReflection PHP Метод

    public function getStorageReflection();

 private function fetchCounts(SqlBuilder $builder, array $values)
 {
     $targetStoragePrimaryKey = $this->targetMapper->getStorageReflection()->getStoragePrimaryKey()[0];
     $builder = clone $builder;
     $table = $builder->getTableName();
     $builder->addSelect("{$table}.{$this->joinStorageKey}");
     $builder->addSelect("COUNT({$table}.{$targetStoragePrimaryKey}) AS count");
     $builder->addWhere("{$table}.{$this->joinStorageKey}", $values);
     $builder->setGroup("{$table}.{$this->joinStorageKey}");
     $builder->setOrder([], []);
     $result = $this->context->queryArgs($builder->buildSelectQuery(), $builder->getParameters());
     $counts = [];
     foreach ($result->fetchAll() as $row) {
         $counts[$row->{$this->joinStorageKey}] = $row['count'];
     }
     return $counts;
 }