public Processing processing() {
        ProcessingHandler processingHandler = (ProcessingHandler) container
                .getRequestHandlerRegistry()
                .getComponent(ProcessingHandler.class.getName());

        if (processingHandler == null) {
            throw new UnsupportedOperationException("This JDisc does not have 'processing' configured.");
        }

        return new Processing(processingHandler);
    }
Returns a {@link Processing}, used to do generic asynchronous operations in a request/response API.

@return a Processing instance
@throws UnsupportedOperationException if this JDisc does not have processing configured
application/src/main/java/com/yahoo/application/container/JDisc.java