You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: wasm.go
    path of file: ./repos/wit-bindgen/tests/runtime/serverless
    
    the code of the file until where you have to start completion: package main

import (
	. "wit_serverless_go/gen"
)

func init() {
	a := HttpImpl{}
	SetHandler(a)
}

type HttpImpl struct {
}

func (i HttpImpl) HandleHttp(req HandlerRequest) Result[HandlerResponse, HandlerHttpError] {
	for _, header := range req.
    
func (i HttpImpl) HandleHttp(req HandlerRequest) Result[HandlerResponse, HandlerHttpError] {
	for _, header := range req.Headers {
		println(header.F0)
		println(header.F1)
	}
	for _, arg := range req.Params {
		println(arg.F0)
		println(arg.F1)
	}
	response := HandlerResponse{}
	response.Status = 200
	response.Body = Some[[]uint8]([]byte("hello world!"))

	var res Result[HandlerResponse, HandlerHttpError]
	res.Set(response)
	return res
}