String operationName = output.getId().getSuffix();
if(operationName==null)
throw new IllegalArgumentException("Illegal operation name mapping: "+ output.getId()+ " (suffix required)");
DMRMapping mapping = interactionUnit.findMapping(DMR);
String address = mapping.getResolvedAddress();
final QName operationRef = new QName( // internal reference. See CommandFactory#createGenericCommand()
output.getSource().getNamespaceURI(),
output.getSource().getLocalPart(),
operationName);