@Override
    protected Node createNode() {
        ObjectNode.Builder nodeBuilder = Node.objectNodeBuilder().sourceLocation(getSourceLocation());
        if (throttling) {
            nodeBuilder.withMember("throttling", true);
        }
        return nodeBuilder.build();
    }
@return Returns true if the retry is a throttle.
smithy-model/src/main/java/software/amazon/smithy/model/traits/RetryableTrait.java