_formatResult is not supporting multi-dimensional arrays

[Oybek Daniyarov]

Hi,

Can you use this:

https://docs.aws.amazon.com/aws-sdk-php/v2/api/class-Aws.DynamoDb.Marshaler.html
$marshaler = new Marshaler();
return $marshaler->unmarshalItem($item);

in "_formatResult " function for formatting array?