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: visitor.go
    path of file: ./repos/devspace/vendor/sigs.k8s.io/kustomize/kyaml/yaml/merge3
    
    the code of the file until where you have to start completion: // Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0

package merge3

import (
	"sigs.k8s.io/kustomize/kyaml/openapi"
	"sigs.k8s.io/kustomize/kyaml/yaml"
	"sigs.k8s.io/kustomize/kyaml/yaml/walk"
)

type ConflictStrategy uint

const (
	// TODO: Support more strategies
	TakeUpdate ConflictStrategy = 1 + iota
)

type Visitor struct{
    
func (m Visitor) visitAList(nodes walk.Sources, _ *openapi.ResourceSchema) (*yaml.RNode, error) {
	if yaml.IsMissingOrNull(nodes.Updated()) && !yaml.IsMissingOrNull(nodes.Origin()) {
		// implicitly cleared from update -- element was deleted
		return walk.ClearNode, nil
	}
	if yaml.IsMissingOrNull(nodes.Dest()) {
		// not cleared, but missing from the dest
		// initialize a new value that can be recursively merged
		return yaml.NewRNode(&yaml.Node{Kind: yaml.SequenceNode}), nil
	}

	// recursively merge the dest with the original and updated
	return nodes.Dest(), nil
}