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: node.go
    path of file: ./repos/gotosocial/vendor/github.com/go-swagger/go-swagger/cmd/swagger/commands/diff
    
    the code of the file until where you have to start completion: package diff

import (
	"fmt"

	"github.com/go-openapi/spec"
)

// Node is the position od a diff in a spec
type Node struct {
	Field     string `json:"name,omitempty"`
	Typ
    
func (n Node) Copy() *Node {
	newChild := n.ChildNode
	if newChild != nil {
		newChild = newChild.Copy()
	}
	newNode := Node{
		Field:     n.Field,
		TypeName:  n.TypeName,
		IsArray:   n.IsArray,
		ChildNode: newChild,
	}

	return &newNode
}