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: api.indices.forcemerge.go
    path of file: ./repos/corteza/extra/server-discovery/vendor/github.com/elastic/go-elasticsearch/v7/esapi
    
    the code of the file until where you have to start completion: // Licensed to Elasticsearch B.V under one or more agreements.
// Elasticsearch B.V. licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
//
// Code generated from specification version 7.12.0: DO NOT EDIT

package esapi

import (
	"context"
	"net/http"
	"strconv"
	"strings"
)

func newIndicesForcemergeFunc(t Transport) IndicesForcemerge {
	return func(o ...func(*IndicesForcemergeRequest)) (*Response, error) {
		var r = IndicesForcemergeRequest{}
		for _, f := range o {
			f(&r)
		}
		return r.Do(r.ctx, t)
	}
}

// ----- API Definition -------------------------------------------------------

// IndicesForcemerge performs the force merge operation on one or more indices.
//
// See full documentation at https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-forcemerge.html.
//
type IndicesForcemerge func(o ...func(*IndicesForcemergeRequest)) (*Response, error)

// IndicesForcemergeRequest configures the Indices Forcemerge API request.
//
type IndicesForcemergeRequest struct {
	Index []string

	AllowNoIndices     *bool
	ExpandWildcards    string
	Flush              *bool
	IgnoreUnavailable  *bool
	MaxNumSegments     *int
	OnlyExpungeDeletes *bool

	Pretty     bool
	Human      bool
	ErrorTrace bool
	FilterPath []string

	Header http.Header

	ctx context.Context
}

// Do executes the request and returns response or error.
//
func (r IndicesForcemergeRequest) Do(ctx context.Context, transport Transport) (*Response, error) {
	var (
		method string
		path   strings.Builder
		params map[string]string
	)

	method = "POST"

	path.Grow(1 + len(strings.Join(r.Index, ",")) + 1 + len("_forcemerge"))
	if len(r.Index) > 0 {
		path.WriteString("/")
		path.WriteString(strings.Join(r.Index, ","))
	}
	path.WriteString("/")
	path.WriteStrin
    
func (r IndicesForcemergeRequest) Do(ctx context.Context, transport Transport) (*Response, error) {
	var (
		method string
		path   strings.Builder
		params map[string]string
	)

	method = "POST"

	path.Grow(1 + len(strings.Join(r.Index, ",")) + 1 + len("_forcemerge"))
	if len(r.Index) > 0 {
		path.WriteString("/")
		path.WriteString(strings.Join(r.Index, ","))
	}
	path.WriteString("/")
	path.WriteString("_forcemerge")

	params = make(map[string]string)

	if r.AllowNoIndices != nil {
		params["allow_no_indices"] = strconv.FormatBool(*r.AllowNoIndices)
	}

	if r.ExpandWildcards != "" {
		params["expand_wildcards"] = r.ExpandWildcards
	}

	if r.Flush != nil {
		params["flush"] = strconv.FormatBool(*r.Flush)
	}

	if r.IgnoreUnavailable != nil {
		params["ignore_unavailable"] = strconv.FormatBool(*r.IgnoreUnavailable)
	}

	if r.MaxNumSegments != nil {
		params["max_num_segments"] = strconv.FormatInt(int64(*r.MaxNumSegments), 10)
	}

	if r.OnlyExpungeDeletes != nil {
		params["only_expunge_deletes"] = strconv.FormatBool(*r.OnlyExpungeDeletes)
	}

	if r.Pretty {
		params["pretty"] = "true"
	}

	if r.Human {
		params["human"] = "true"
	}

	if r.ErrorTrace {
		params["error_trace"] = "true"
	}

	if len(r.FilterPath) > 0 {
		params["filter_path"] = strings.Join(r.FilterPath, ",")
	}

	req, err := newRequest(method, path.String(), nil)
	if err != nil {
		return nil, err
	}

	if len(params) > 0 {
		q := req.URL.Query()
		for k, v := range params {
			q.Set(k, v)
		}
		req.URL.RawQuery = q.Encode()
	}

	if len(r.Header) > 0 {
		if len(req.Header) == 0 {
			req.Header = r.Header
		} else {
			for k, vv := range r.Header {
				for _, v := range vv {
					req.Header.Add(k, v)
				}
			}
		}
	}

	if ctx != nil {
		req = req.WithContext(ctx)
	}

	res, err := transport.Perform(req)
	if err != nil {
		return nil, err
	}

	response := Response{
		StatusCode: res.StatusCode,
		Body:       res.Body,
		Header:     res.Header,
	}

	return &response, nil
}