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: reference.go
    path of file: ./repos/kubernetes/vendor/github.com/go-openapi/jsonreference
    
    the code of the file until where you have to start completion: // Copyright 2013 sigu-399 ( https://github.com/sigu-399 )
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License
    
func (r *Ref) parse(jsonReferenceString string) error {

	parsed, err := url.Parse(jsonReferenceString)
	if err != nil {
		return err
	}

	internal.NormalizeURL(parsed)

	r.referenceURL = parsed
	refURL := r.referenceURL

	if refURL.Scheme != "" && refURL.Host != "" {
		r.HasFullURL = true
	} else {
		if refURL.Path != "" {
			r.HasURLPathOnly = true
		} else if refURL.RawQuery == "" && refURL.Fragment != "" {
			r.HasFragmentOnly = true
		}
	}

	r.HasFileScheme = refURL.Scheme == "file"
	r.HasFullFilePath = strings.HasPrefix(refURL.Path, "/")

	// invalid json-pointer error means url has no json-pointer fragment. simply ignore error
	r.referencePointer, _ = jsonpointer.New(refURL.Fragment)

	return nil
}