public void setClientRequestToken(String clientRequestToken) {
        this.clientRequestToken = clientRequestToken;
    }
<p>
A unique identifier for this <code>RollbackStack</code> request.
</p>

@param clientRequestToken
       A unique identifier for this <code>RollbackStack</code> request.
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/RollbackStackRequest.java