whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(String url, String method, dynamic data, Map<String, dynamic> queryParams, int statusCode, @JsonKey.new(toJson: _toJsonByData) dynamic body, Map<String, dynamic> headers, Map<String, dynamic> responseHeaders, int timestamp, String projectName, @JsonKey.new(toJson: null, fromJson: null, includeFromJson: false, includeToJson: false) Response? response, List<String> extendNotes,)?)

A variant of when that fallback to returning null

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  TResult? Function(
          String url,
          String method,
          dynamic data,
          Map<String, dynamic> queryParams,
          int statusCode,
          @JsonKey(toJson: _toJsonByData) dynamic body,
          Map<String, dynamic> headers,
          Map<String, dynamic> responseHeaders,
          int timestamp,
          String projectName,
          @JsonKey(
              toJson: null,
              fromJson: null,
              includeFromJson: false,
              includeToJson: false)
          Response? response,
          List<String> extendNotes)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _SendResponseModel() when $default != null:
      return $default(
          _that.url,
          _that.method,
          _that.data,
          _that.queryParams,
          _that.statusCode,
          _that.body,
          _that.headers,
          _that.responseHeaders,
          _that.timestamp,
          _that.projectName,
          _that.response,
          _that.extendNotes);
    case _:
      return null;
  }
}