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

package comments

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

// CopyComments recursively copies the comments on fields in from to fields in to
func CopyComments(from, to *yaml.RNode) error {
	// from node should not be modified, it should be just used as a reference
	fromCop
    
func (c *copier) VisitScalar(s walk.Sources, _ *openapi.ResourceSchema) (*yaml.RNode, error) {
	to := s.Origin()
	// TODO: File a bug with upstream yaml to handle comments for FoldedStyle scalar nodes
	// Hack: convert FoldedStyle scalar node to DoubleQuotedStyle as the line comments are
	// being serialized without space
	// https://github.com/GoogleContainerTools/kpt/issues/766
	if to != nil && to.Document().Style == yaml.FoldedStyle {
		to.Document().Style = yaml.DoubleQuotedStyle
	}

	copyFieldComments(s.Dest(), to)
	return s.Dest(), nil
}