@Override
    public Set<UUID> unmarshall(AttributeValue value) {
        Set<UUID> result = new HashSet<UUID>();

        for (String s : value.getSS()) {
            result.add(UUID.fromString(s));
        }

        return result;
    }
An unmarshaller that unmarshals sets of UUIDs as sets of
Java {@code UUID} objects.

@author Sergei Egorov
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/unmarshallers/UUIDSetUnmarshaller.java