public void setLessThan(DocumentAttribute lessThan) {
        this.lessThan = lessThan;
    }
<p>
Performs a less than operation on document attributes/fields and their values. Use with the <a
href="https://docs.aws.amazon.com/kendra/latest/APIReference/API_DocumentAttributeValue.html">document attribute
type</a> <code>Date</code> or <code>Long</code>.
</p>

@param lessThan
       Performs a less than operation on document attributes/fields and their values. Use with the <a
       href="https://docs.aws.amazon.com/kendra/latest/APIReference/API_DocumentAttributeValue.html">document
       attribute type</a> <code>Date</code> or <code>Long</code>.
aws-java-sdk-kendra/src/main/java/com/amazonaws/services/kendra/model/AttributeFilter.java