func (s *ExistsService) Human(human bool) *ExistsService {
	s.human = &human
	return s
}
Human specifies whether human readable values should be returned in
the JSON response, e.g. "7.5mb".
package elastic
import (
	"context"
	"fmt"
	"net/http"
	"net/url"
	"strings"
	"github.com/olivere/elastic/v7/uritemplates"
)
type ExistsService struct {
	client *Client
	pretty     *bool        
	human      *bool        
	errorTrace *bool        
	filterPath []string     
	headers    http.Header  
	id         string
	index      string
	typ        string
	preference string
	realtime   *bool
	refresh    string
	routing    string
	parent     string
}
func NewExistsService(client *Client) *ExistsService {
	return &ExistsService{
		client: client,
		typ:    "_doc",
	}
}
func (s *ExistsService) Pretty(pretty bool) *ExistsService {
	s.pretty = &pretty
	return s
}