app.Add("/", new(Struct)) 这种写法怎么理解

https://github.com/yarf-framework/yarf

package main

import (
    "github.com/yarf-framework/yarf"
)

// Define a simple resource
type Hello struct {
    yarf.Resource
}

// Implement the GET method
func (h *Hello) Get(c *yarf.Context) error {
    c.Render("Hello world!")

    return nil
}

// Run app server on http://localhost:8080
func main() {
    y := yarf.New()

    y.Add("/", new(Hello))

    y.Start(":8080")
}

通常添加路由是 Add(path,func)
add("/",new(Struct)) 这个怎么理解