func (f SearchableSnapshotsStats) WithIndex(v ...string) func(*SearchableSnapshotsStatsRequest) {
	return func(r *SearchableSnapshotsStatsRequest) {
		r.Index = v
	}
}
WithIndex - a list of index names.
package esapi
import (
	"context"
	"net/http"
	"strings"
)
func newSearchableSnapshotsStatsFunc(t Transport) SearchableSnapshotsStats {
	return func(o ...func(*SearchableSnapshotsStatsRequest)) (*Response, error) {
		var r = SearchableSnapshotsStatsRequest{}
		for _, f := range o {
			f(&r)
		}
		return r.Do(r.ctx, t)
	}
}
type SearchableSnapshotsStats func(o ...func(*SearchableSnapshotsStatsRequest)) (*Response, error)
type SearchableSnapshotsStatsRequest struct {
	Index []string
	Pretty     bool
	Human      bool
	ErrorTrace bool
	FilterPath []string
	Header http.Header
	ctx context.Context
}
func (r SearchableSnapshotsStatsRequest) Do(ctx context.Context, transport Transport) (*Response, error) {
	var (
		method string
		path   strings.Builder
		params map[string]string
	)
	method = "GET"
	path.Grow(1 + len(strings.Join(r.Index, ",")) + 1 + len("_searchable_snapshots") + 1 + len("stats"))
	if len(r.Index) > 0 {
		path.WriteString("/")
		path.WriteString(strings.Join(r.Index, ","))
	}
	path.WriteString("/")
	path.WriteString("_searchable_snapshots")
	path.WriteString("/")
	path.WriteString("stats")
	params = make(map[string]string)
	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
}
func (f SearchableSnapshotsStats) WithContext(v context.Context) func(*SearchableSnapshotsStatsRequest) {
	return func(r *SearchableSnapshotsStatsRequest) {
		r.ctx = v
	}
}