public void setNextToken(String nextToken) {
        this.nextToken = nextToken;
    }
<p>
Used for pagination. Only necessary if a previous API call includes a non-null NextToken value. If provided,
returns results for the next page.
</p>

@param nextToken
       Used for pagination. Only necessary if a previous API call includes a non-null NextToken value. If
       provided, returns results for the next page.
aws-java-sdk-elasticsearch/src/main/java/com/amazonaws/services/elasticsearch/model/ListPackagesForDomainRequest.java