public function findOneByAttributeIdAndAttributeSetId($attributeId, $attributeSetId)
    {

        // initialize the params
        $params = array(
            MemberNames::ATTRIBUTE_ID       => $attributeId,
            MemberNames::ATTRIBUTE_SET_ID   => $attributeSetId
        );

        // load and return the EAV entity attribute with the passed params
        $this->entityAttributeByAttributeIdAndAttributeSetIdStmt->execute($params);
        return $this->entityAttributeByAttributeIdAndAttributeSetIdStmt->fetch(\PDO::FETCH_ASSOC);
    }