Is there a way to generate OpenAPI v3 specification from go source code? Let's say I have a go API like the one below and I'd like to generate the OpenAPI specification (yaml file) from it. Something similar to Python's Flask RESTX. I know there are tools that generate go source code from the specs, however, I'd like to do it the other way around.

package main

import "net/http"

func main() {
    http.HandleFunc("/hello", func(w http.ResponseWriter, r *http.Request) {
        w.Write([]byte("world\n"))
    })
    http.ListenAndServe(":5050", nil)
}