package main

import (
    "fmt"
)

type LibID string

type ID struct {
    LibID
}

func (id *ID) String() string {
    return string(id.LibID)
}

func NewID() *ID {
    return &ID{
        "NewID",
    }
}

type Object struct {
    ObjID *ID
}

type NewObject struct {
    ObjID *ID
}

func newObject(obj *Object) NewObject {
    result := NewObject{
        ObjID: obj.ObjID,
    }
    // Pointer ObjID is referencing the correct ObjID.
    fmt.Println(result.ObjID)

    return result
}

func main() {
    objs := []*Object{
        {
            ObjID: NewID(),
        },
    }

    newObjs := make([]NewObject, len(objs))
    for i, object := range objs {
        newObjs[i] = newObject(object)
        fmt.Println(newObjs[0].ObjID)
    }

    // Pointer ObjID is no longer referencing something here.
    fmt.Println(newObjs[0].ObjID)
}