code: public function findOneByValueIdAndStoreIdAndRowId($valueId, $storeId, $rowId)
      {
  
          // initialize the params
          $params = array(
              MemberNames::VALUE_ID  => $valueId,
              MemberNames::STORE_ID  => $storeId,
              MemberNames::ROW_ID    => $rowId
          );
  
          // load and return the prodcut media gallery value with the passed value/store/parent ID
          $this->productMediaGalleryValueStmt->execute($params);
          return $this->productMediaGalleryValueStmt->fetch(\PDO::FETCH_ASSOC);
      }
docs: Load's the product media gallery value with the passed value/store/row ID.
  
  @param integer $valueId The value ID of the product media gallery value to load
  @param string  $storeId The store ID of the product media gallery value to load
  @param string  $rowId   The row ID of the parent product of the product media gallery value to load
  
  @return array The product media gallery value