when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>(
  1. TResult $default(
    1. String category,
    2. @JsonKey.new(name: 'total_items') int totalItems,
    3. @JsonKey.new(name: 'start_date') String startDate,
    4. @JsonKey.new(name: 'end_date') String endDate,
    5. @JsonKey.new(name: 'total_count') int totalCount,
    6. Map<String, int> items,
    )
)

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String category, @JsonKey(name: 'total_items')  int totalItems, @JsonKey(name: 'start_date')  String startDate, @JsonKey(name: 'end_date')  String endDate, @JsonKey(name: 'total_count')  int totalCount,  Map<String, int> items)  $default,) {final _that = this;
switch (_that) {
case _AnalyticsData():
return $default(_that.category,_that.totalItems,_that.startDate,_that.endDate,_that.totalCount,_that.items);case _:
  throw StateError('Unexpected subclass');

}
}