owRoot.appendChild(instance.root);
     *     // Changing a property on the instance will propagate to bindings
     *     // in the template
     *     instance.myProp = 'new value';
     *
     * The `options` dictionary passed to `templatize` allows for customizing
     * features of the generated template class, including how outer-scope host
     * properties should be forwarded into template instances, how any instance
     * properties added into the template's scope should be notified out to
     * 