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: subscribemessage.go
    path of file: ./repos/weapp/subscribemessage
    
    the code of the file until where you have to start completion: package subscribemessage

import "github.com/medivhzhan/weapp/v3/request"

type SubscribeMessage struct {
	request *request.Request
	// 组成完整的 URL 地址
	// 默认包含 AccessToken
	combineURI func(url string, req interface{}, withTok
    
func NewSubscribeMessage(request *request.Request, combineURI func(url string, req interface{}, withToken bool) (string, error)) *SubscribeMessage {
	sm := SubscribeMessage{
		request:    request,
		combineURI: combineURI,
	}

	return &sm
}