func (f IndicesPutMapping) WithIndex(v ...string) func(*IndicesPutMappingRequest) {
	return func(r *IndicesPutMappingRequest) {
		r.Index = v
	}
}
WithIndex - a list of index names the mapping should be added to (supports wildcards); use `_all` or omit to add the mapping on all indices..
package opensearchapi
import (
	"context"
	"io"
	"net/http"
	"strconv"
	"strings"
	"time"
)
func newIndicesPutMappingFunc(t Transport) IndicesPutMapping {
	return func(body io.Reader, o ...func(*IndicesPutMappingRequest)) (*Response, error) {
		var r = IndicesPutMappingRequest{Body: body}
		for _, f := range o {
			f(&r)
		}
		return r.Do(r.ctx, t)
	}
}
type IndicesPutMapping func(body io.Reader, o ...func(*IndicesPutMappingRequest)) (*Response, error)
type IndicesPutMappingRequest struct {
	Index        []string
	DocumentType string
	Body io.Reader
	AllowNoIndices    *bool
	ExpandWildcards   string
	IgnoreUnavailable *bool
	IncludeTypeName   *bool
	MasterTimeout     time.Duration
	Timeout           time.Duration
	WriteIndexOnly    *bool
	Pretty     bool
	Human      bool
	ErrorTrace bool
	FilterPath []string
	Header http.Header
	ctx context.Context
}
func (r IndicesPutMappingRequest) Do(ctx context.Context, transport Transport) (*Response, error) {
	var (
		method string
		path   strings.Builder
		params map[string]string
	)
	method = "PUT"
	path.Grow(len(strings.Join(r.Index, ",")) + len("/_mapping") + len(r.DocumentType) + 2)
	if len(r.Index) > 0 {
		path.WriteString("/")
		path.WriteString(strings.Join(r.Index, ","))
	}
	path.WriteString("/")
	path.WriteString("_mapping")
	if r.DocumentType != "" {
		path.WriteString("/")
		path.WriteString(r.DocumentType)
	}
	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.IgnoreUnavailable != nil {
		params["ignore_unavailable"] = strconv.FormatBool(*r.IgnoreUnavailable)
	}
	if r.IncludeTypeName != nil {
		params["include_type_name"] = strconv.FormatBool(*r.IncludeTypeName)
	}
	if r.MasterTimeout != 0 {
		params["master_timeout"] = formatDuration(r.MasterTimeout)
	}
	if r.Timeout != 0 {
		params["timeout"] = formatDuration(r.Timeout)
	}
	if r.WriteIndexOnly != nil {
		params["write_index_only"] = strconv.FormatBool(*r.WriteIndexOnly)
	}
	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(), r.Body)
	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 r.Body != nil {
		req.Header[headerContentType] = headerContentTypeJSON
	}
	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
}
func (f IndicesPutMapping) WithContext(v context.Context) func(*IndicesPutMappingRequest) {
	return func(r *IndicesPutMappingRequest) {
		r.ctx = v
	}
}