toMap method Null safety

Implementation

@override
Map<String, Object?> toMap() {
  return {
    'name': this.name,
    'departureStation': this.departureStation,
    'arriveTime': this.arriveTime,
    'departureTime': this.departureTime,
    'arriveStation': this.arriveStation,
    'price': this.price,
    'bookingUrl': this.bookingUrl,
    'providerName': this.providerName,
    'providerUrl': this.providerUrl
  };
}