const ReservationsESTC = composeWithElastic({
 graphqlTypeName: 'ReservationsES',
 elasticIndex: 'reservations',
 elasticMapping: reservationMapping,
 elasticType: 'reservations',
 elasticClient: new elasticsearch.Client({
 host: 'http://localhost:9200',
 apiVersion: '7.7',
 log: 'trace',
 }),
 // elastic mapping does not contain information about is fields are arrays or not
 // so provide this information explicitly for obtaining correct types in GraphQL
 pluralFields: ['reviews', 'places', 'cities'],
});

 POST http://localhost:9200/reservations/_search?type=reservations&q=Boulevard
 {
 "explain": true,
 "version": true,
 "_source": false,
 "track_scores": true
 }