localStorageInfoRPC            = grid.NewSingleHandler[*grid.MSS, *grid.JSON[madmin.StorageInfo]](grid.HandlerStorageInfo, grid.NewMSS, madminStorageInfo.NewJSON)
	makeBucketRPC                  = grid.NewSingleHandler[*grid.MSS, grid.NoPayload](grid.HandlerMakeBucket, grid.NewMSS, grid.NewNoPayload)

		t.Errorf("%d bytes left over after Skip(): %q", len(left), left)
	}
	if !reflect.DeepEqual(v, v2) {
		t.Errorf("MSS: %v != %v", v, v2)
	}
}

func TestMarshalUnmarshalMSSNil(t *testing.T) {
	v := MSS(nil)
	bts, err := v.MarshalMsg(nil)
	if err != nil {
		t.Fatal(err)
	}
	v2 := MSS(make(map[string]string, 1))
	left, err := v2.UnmarshalMsg(bts)
	if err != nil {
		t.Fatal(err)
	}
	if len(left) != 0 {

			_, b = msi[s]
			if !b {
				panic(fmt.Sprintf("tuple existence assign: msi[%d]\n", i))
			}
		}
		{
			_, b := mss[s]
			if !b {
				panic(fmt.Sprintf("tuple existence decl: mss[%d]\n", i))
			}
			_, b = mss[s]
			if !b {
				panic(fmt.Sprintf("tuple existence assign: mss[%d]\n", i))
			}
		}
		{
			_, b := mspa[s]
			if !b {
				panic(fmt.Sprintf("tuple existence decl: mspa[%d]\n", i))

type Recycler interface {
	Recycle()
}

// MSS is a map[string]string that can be serialized.
// It is not very efficient, but it is only used for easy parameter passing.
type MSS map[string]string

// Get returns the value for the given key.
func (m *MSS) Get(key string) string {
	if m == nil {
		return ""
	}
	return (*m)[key]
}

// Set a key, value pair.
func (m *MSS) Set(key, value string) {
	if m == nil {

        final MavenSession ms = nonNull(getMavenSession());
        final MavenSession mss;
        if (repoSession != ms.getRepositorySession()) {
            mss = new MavenSession(repoSession, ms.getRequest(), ms.getResult());
        } else {
            mss = ms;
        }
        return newSession(mss, repositories);
    }

	// If the context contains a TraceParamsKey, add it to the trace path.
	v := ctx.Value(TraceParamsKey{})
	// Should match SingleHandler.Call checks.
	switch typed := v.(type) {
	case *MSS:
		trace.Path += typed.ToQuery()
	case map[string]string:
		m := MSS(typed)
		trace.Path += m.ToQuery()
	case *URLValues:
		trace.Path += typed.Values().Encode()
	case *NoPayload, *Bytes:

	if conn == nil {
		return madmin.HealResultItem{}, nil
	}

	mss := grid.NewMSSWith(map[string]string{
		peerS3Bucket:        bucket,
		peerS3BucketDeleted: strconv.FormatBool(opts.Remove),
	})

	ctx, cancel := context.WithTimeout(ctx, globalDriveConfig.GetMaxTimeout())
	defer cancel()

	_, err := healBucketRPC.Call(ctx, conn, mss)

	// Initialize heal result info
	return madmin.HealResultItem{

These must provide `msgp` serialization and deserialization.

In the examples we use a `MSS` type, which is a `map[string]string` that is `msgp` serializable.

```go
    handler := func(request *grid.MSS) (*grid.MSS, *grid.RemoteErr) {
        fmt.Println("Got request with field", request["myfield"])
        // Do something with payload

	// 1: Echo
	h1 := NewSingleHandler[*MSS, *MSS](handlerTest, NewMSS, NewMSS)
	// Handles incoming requests, returns a response
	handler1 := func(req *MSS) (resp *MSS, err *RemoteErr) {
		resp = h1.NewResponse()
		for k, v := range *req {
			(*resp)[k] = v
		}
		return resp, nil
	}
	// Return error
	h2 := NewSingleHandler[*MSS, *MSS](handlerTest2, NewMSS, NewMSS)

	}
	scfg.CmdLines = cmdLines
	return scfg
}

func (s *bootstrapRESTServer) VerifyHandler(params *grid.MSS) (*ServerSystemConfig, *grid.RemoteErr) {
	return getServerSystemCfg(), nil
}

var serverVerifyHandler = grid.NewSingleHandler[*grid.MSS, *ServerSystemConfig](grid.HandlerServerVerify, grid.NewMSS, func() *ServerSystemConfig { return &ServerSystemConfig{} })