public void setNextToken(String nextToken) {
        this.nextToken = nextToken;
    }
<p>
If the response is truncated, Amazon Rekognition returns this token that you can use in the subsequent request to
retrieve the next set of faces.
</p>

@param nextToken
       If the response is truncated, Amazon Rekognition returns this token that you can use in the subsequent
       request to retrieve the next set of faces.
aws-java-sdk-rekognition/src/main/java/com/amazonaws/services/rekognition/model/ListFacesResult.java