$Metro constructor Null safety

$Metro(
  1. {String? countryCode,
  2. String? countryDartId,
  3. String? dartId,
  4. String? dmaId,
  5. String? kind,
  6. String? metroCode,
  7. String? name}
)

Implementation

$Metro({
  this.countryCode,
  this.countryDartId,
  this.dartId,
  this.dmaId,
  this.kind,
  this.metroCode,
  this.name,
});