public void setCallbackId(String callbackId) {
        this.callbackId = callbackId;
    }
<p>
The call back ID passed in the request.
</p>

@param callbackId
       The call back ID passed in the request.
aws-java-sdk-chimesdkmessaging/src/main/java/com/amazonaws/services/chimesdkmessaging/model/ChannelFlowCallbackResult.java