public void setNextToken(String nextToken) {
        this.nextToken = nextToken;
    }
<p>
The token for the next set of results, or an empty or null value if there are no more results.
</p>

@param nextToken
       The token for the next set of results, or an empty or null value if there are no more results.
aws-java-sdk-paymentcryptography/src/main/java/com/amazonaws/services/paymentcryptography/model/ListKeysResult.java