public function loadChildrens($productIds, $storeId)
    {
        $children = [];

        foreach ($this->catalogProductType->getCompositeTypes() as $productTypeId) {
            $typeInstance = $this->getProductTypeInstance($productTypeId);
            $relation = $typeInstance->getRelationInfo();

            if ($relation->getTable() && $relation->getParentFieldName() && $relation->getChildFieldName()) {
                $select = $this->getRelationQuery($relation, $productIds, $storeId);
                $data   = $this->getConnection()->fetchAll($select);

                foreach ($data as $relationRow) {
                    $parentId = (int) $relationRow['parent_id'];
                    $childId  = (int) $relationRow['child_id'];
                    $sku      = (string) $relationRow['sku'];
                    $configurableAttributes = array_filter(explode(',', $relationRow["configurable_attributes"]));
                    $children[$childId][] = [
                        "parent_id"               => $parentId,
                        "configurable_attributes" => $configurableAttributes,
                        "sku"                     => $sku,
                    ];
                }
            }
        }

        return $children;
    }