public String getId() {
        return this.id;
    }
<p>
The unique identifier for the query result item id (<code>Id</code>) and the query result item document id (
<code>DocumentId</code>) combined. The value of this field changes with every request, even when you have the
same documents.
</p>

@return The unique identifier for the query result item id (<code>Id</code>) and the query result item document
        id (<code>DocumentId</code>) combined. The value of this field changes with every request, even when you
        have the same documents.
aws-java-sdk-kendra/src/main/java/com/amazonaws/services/kendra/model/QueryResultItem.java