public T in(Object ...values) {
        if (values == null || values.length == 0) {
            throw new IllegalArgumentException("values must not be null or empty.");
        }

        return _withComparisonOperator(ComparisonOperator.IN)._withValues(values);
    }
Creates and returns a condition of the range key with a value that begins
with the given value.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/document/internal/Filter.java