eInfo, options);
          templateInfo.templatizeInstanceClass = baseClass;
        }
        // Host property forwarding must be installed onto template instance
        addPropagateEffects(template, templateInfo, options);
        // Subclass base class and add reference for this specific template
        let klass = class TemplateInstance extends baseClass {};
        klass.prototype._methodHost = findMethodHost(template);
        klass.prototype.__dataHost = template;
        klass.prototype.__templati