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: map.go
    path of file: ./repos/cosmos-sdk/collections
    
    the code of the file until where you have to start completion: package collections

import (
	"bytes"
	"context"
	"fmt"

	"cosmossdk.io/collections/codec"
	"cosmossdk.io/core/store"
)

// Map represents the basic collections object.
// It is used to map arbitrary keys to arbitrary
// objects.
type Map[K, V any] struct {
	kc codec.KeyCodec[K]
	vc codec.ValueCodec[V]

	// store accessor
	sa     func(context.Context) store.KVStore
	prefix []byte
	name   st
    
func (m Map[K, V]) Walk(ctx context.Context, ranger Ranger[K], walkFunc func(key K, value V) (stop bool, err error)) error {
	iter, err := m.Iterate(ctx, ranger)
	if err != nil {
		return err
	}
	defer iter.Close()

	for ; iter.Valid(); iter.Next() {
		kv, err := iter.KeyValue()
		if err != nil {
			return err
		}
		stop, err := walkFunc(kv.Key, kv.Value)
		if err != nil {
			return err
		}
		if stop {
			return nil
		}
	}
	return nil
}