public String getNextToken() {
        return this.nextToken;
    }
<p>
If the request doesn't return all of the remaining results, <code>NextToken</code> is set to a token. To retrieve
the next set of results, call <code>ListStackInstances</code> again and assign that token to the request object's
<code>NextToken</code> parameter. If the request returns all results, <code>NextToken</code> is set to
<code>null</code>.
</p>

@return If the request doesn't return all of the remaining results, <code>NextToken</code> is set to a token. To
        retrieve the next set of results, call <code>ListStackInstances</code> again and assign that token to the
        request object's <code>NextToken</code> parameter. If the request returns all results,
        <code>NextToken</code> is set to <code>null</code>.
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/ListStackSetsResult.java