public ChannelFlowCallbackRequest withCallbackId(String callbackId) {
        setCallbackId(callbackId);
        return this;
    }
<p>
The identifier passed to the processor by the service when invoked. Use the identifier to call back the service.
</p>

@param callbackId
       The identifier passed to the processor by the service when invoked. Use the identifier to call back the
       service.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-chimesdkmessaging/src/main/java/com/amazonaws/services/chimesdkmessaging/model/ChannelFlowCallbackRequest.java