public void setNextToken(String nextToken) {
        this.nextToken = nextToken;
    }
<p>
A token for requesting another page of certificates if the <code>NextToken</code> response element indicates that
more certificates are available. Use the value of the returned <code>NextToken</code> element in your request
until the token comes back as <code>null</code>. Pass <code>null</code> if this is the first call.
</p>

@param nextToken
       A token for requesting another page of certificates if the <code>NextToken</code> response element
       indicates that more certificates are available. Use the value of the returned <code>NextToken</code>
       element in your request until the token comes back as <code>null</code>. Pass <code>null</code> if this is
       the first call.
aws-java-sdk-directory/src/main/java/com/amazonaws/services/directory/model/ListCertificatesRequest.java