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

package filters

import (
	"fmt"

	"sigs.k8s.io/kustomize/kyaml/kio"
	"sigs.k8s.io/kustomize/kyaml/kio/kioutil"
	"sigs.k8s.io/kustomize/kyaml/yaml"
	"sigs.k8s.io/kustomize/kyaml/yaml/merge3"
)

const (
	mergeSourceAnnotation = "config.kubernetes.io/merge-source"
	mergeSourceOriginal   = "original"
	mergeSourceUpdated    = "updated"
	mergeSourceDest       = "dest"
)

// ResourceMatcher interface is used to match two resources based on IsSameResource implementation
// This is the way to group same logical resources in upstream, local and origin for merge
// The default way to group them is using GVKNN similar to how kubernetes server identifies resources
// Users of this library might have their own interpretation of grouping similar resources
// for e.g. if consumer adds a name-prefix to local resou
    
func (m Merge3) Merge() error {
	// Read the destination package.  The ReadWriter will take take of deleting files
	// for removed resources.
	var inputs []kio.Reader
	dest := &kio.LocalPackageReadWriter{
		PackagePath:    m.DestPath,
		MatchFilesGlob: m.MatchFilesGlob,
		SetAnnotations: map[string]string{mergeSourceAnnotation: mergeSourceDest},
	}
	inputs = append(inputs, dest)

	// Read the original package
	inputs = append(inputs, kio.LocalPackageReader{
		PackagePath:    m.OriginalPath,
		MatchFilesGlob: m.MatchFilesGlob,
		SetAnnotations: map[string]string{mergeSourceAnnotation: mergeSourceOriginal},
	})

	// Read the updated package
	inputs = append(inputs, kio.LocalPackageReader{
		PackagePath:    m.UpdatedPath,
		MatchFilesGlob: m.MatchFilesGlob,
		SetAnnotations: map[string]string{mergeSourceAnnotation: mergeSourceUpdated},
	})

	return kio.Pipeline{
		Inputs:  inputs,
		Filters: []kio.Filter{m},
		Outputs: []kio.Writer{dest},
	}.Execute()
}