public SetAction set(Number... values) {
        return set(new LinkedHashSet<Number>(Arrays.asList(values)));
    }
Returns a <code>SetAction</code> object used for building update
expression. If the attribute referred to by this path operand doesn't
exist, the returned object represents adding the specified value as an
attribute to an item. If the attribute referred to by this path operand
already exists, the returned object represents the value replacement of
the current attribute by the specified value.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/xspec/NS.java