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: delete.go
    path of file: ./repos/malice/vendor/github.com/olivere/elastic
    
    the code of the file until where you have to start completion: // Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.

package elastic

import (
	"context"
	"fmt"
	"net/http"
	"net/url"

	"github.com/olivere/elastic/uritemplates"
)

// DeleteService allows to delete a typed JSON document from a specified
// index based on its id.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/6.2/docs-delete.html
// for details.
type DeleteService struct {
	client              *Client
	pretty              bool
	id                  string
	index               string
	typ                 string
	routing             string
	timeout             string
	version        
    
func (s *DeleteService) buildURL() (string, url.Values, error) {
	// Build URL
	path, err := uritemplates.Expand("/{index}/{type}/{id}", map[string]string{
		"index": s.index,
		"type":  s.typ,
		"id":    s.id,
	})
	if err != nil {
		return "", url.Values{}, err
	}

	// Add query string parameters
	params := url.Values{}
	if s.pretty {
		params.Set("pretty", "true")
	}
	if s.refresh != "" {
		params.Set("refresh", s.refresh)
	}
	if s.routing != "" {
		params.Set("routing", s.routing)
	}
	if s.timeout != "" {
		params.Set("timeout", s.timeout)
	}
	if s.version != nil {
		params.Set("version", fmt.Sprintf("%v", s.version))
	}
	if s.versionType != "" {
		params.Set("version_type", s.versionType)
	}
	if s.waitForActiveShards != "" {
		params.Set("wait_for_active_shards", s.waitForActiveShards)
	}
	if s.parent != "" {
		params.Set("parent", s.parent)
	}
	return path, params, nil
}