PaymentSource.fromJson constructor
      
      PaymentSource.fromJson(
    
    
- Object? json
Implementation
factory PaymentSource.fromJson(Object? json) {
  final map = (json as Map).cast<String, Object?>();
  final type = (map['object'] as String);
  final factory = $mapping[type];
  if (factory == null) {
    throw ArgumentError('Unknown type of PaymentSource: "$type"');
  }
  return factory(map);
}