The name of the callout you created using the ExternalCallout API. This name must match the name of the External Callout category you created in IBM® Marketing Platform.

EXTERNALCALLOUT enables you to call an external application to add data to your interactive flowchart. EXTERNALCALLOUT can return whatever you have created the callout to do. You must write this callout in Java™ using the ExternalCallout API. For more details, see the IBM® Interact Developer's Guide.

Calls the callout getStockPrice passing the name of the stock, UNCA, as the argument. This user defined callout returns the stock price as defined by the callout.