func NewMgetService(client *Client) *MgetService {
	builder := &MgetService{
		client: client,
	}
	return builder
}
NewMgetService initializes a new Multi GET API request call.
package elastic
import (
	"context"
	"fmt"
	"net/url"
	"strings"
)
type MgetService struct {
	client       *Client
	pretty       bool
	preference   string
	realtime     *bool
	refresh      string
	routing      string
	storedFields []string
	items        []*MultiGetItem
}