without-di.go

/* start prcess/process.go */
package process

var fetch Fetch = fetch.NewHttpFetch() // as Gobal field

// or someone like this..
// func int() {
//    fetch = fetch.NewHttpFetch()
// }

func Process(x string) {
   fetch.Fetch(x)
}
/* end prcess/process.go */

/* start fetch/fetch.go */
package fetch

type Fetch interface {
    Fetch(x string)
}

type httpFetch struct {
}

// ............

func NewHttpFetch() Fetch {
     return &httpFetch
}
/* end fetch/fetch.go */