public ComparatorCondition ne(String... values) {
        return new ComparatorCondition("<>", this, new LiteralOperand(
                new LinkedHashSet<String>(Arrays.asList(values))));
    }
Returns a <a href=
"http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html#ConditionExpressionReference.Comparators"
>comparator condition</a> (that evaluates to true if the value of the
current attribute is not equal to the set of specified values) for
building condition expression.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/xspec/SS.java