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: string.go
    path of file: ./repos/kubeedge/vendor/sigs.k8s.io/kustomize/kyaml/yaml/internal/k8sgen/pkg/util/sets
    
    the code of the file until where you have to start completion: // Code generated by k8scopy from k8s.io/apimachinery@v0.19.8; DO NOT EDIT.
// File content copied from k8s.io/apimachinery@v0.19.8/pkg/util/sets/string.go

/*
Copyright The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License
    
func (s1 String) Intersection(s2 String) String {
	var walk, other String
	result := NewString()
	if s1.Len() < s2.Len() {
		walk = s1
		other = s2
	} else {
		walk = s2
		other = s1
	}
	for key := range walk {
		if other.Has(key) {
			result.Insert(key)
		}
	}
	return result
}