func (s *MultiSearchService) Headers(headers http.Header) *MultiSearchService {
	s.headers = headers
	return s
}
Headers specifies the headers of the request.
package elastic
import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"net/url"
	"strings"
)
type MultiSearchService struct {
	client *Client
	pretty     *bool        
	human      *bool        
	errorTrace *bool        
	filterPath []string     
	headers    http.Header  
	requests              []*SearchRequest
	indices               []string
	maxConcurrentRequests *int
	preFilterShardSize    *int
}
func NewMultiSearchService(client *Client) *MultiSearchService {
	builder := &MultiSearchService{
		client: client,
	}
	return builder
}
func (s *MultiSearchService) Pretty(pretty bool) *MultiSearchService {
	s.pretty = &pretty
	return s
}
func (s *MultiSearchService) Human(human bool) *MultiSearchService {
	s.human = &human
	return s
}
func (s *MultiSearchService) ErrorTrace(errorTrace bool) *MultiSearchService {
	s.errorTrace = &errorTrace
	return s
}
func (s *MultiSearchService) FilterPath(filterPath ...string) *MultiSearchService {
	s.filterPath = filterPath
	return s
}
func (s *MultiSearchService) Header(name string, value string) *MultiSearchService {
	if s.headers == nil {
		s.headers = http.Header{}
	}
	s.headers.Add(name, value)
	return s
}