whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(@JsonKey.new(name: 'certificateFile') String? certFile, @JsonKey.new(name: 'certificate') List<String>? certStr, String? keyFile, @JsonKey.new(name: 'key') List<String>? keyStr, TLSCertificateUsage? usage, int? ocspStapling, bool? oneTimeLoading, bool? buildChain,)?)

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(
          @JsonKey(name: 'certificateFile') String? certFile,
          @JsonKey(name: 'certificate') List<String>? certStr,
          String? keyFile,
          @JsonKey(name: 'key') List<String>? keyStr,
          TLSCertificateUsage? usage,
          int? ocspStapling,
          bool? oneTimeLoading,
          bool? buildChain)?
      $default,
) {
  final _that = this;
  switch (_that) {
    case _TLSCertConfig() when $default != null:
      return $default(
          _that.certFile,
          _that.certStr,
          _that.keyFile,
          _that.keyStr,
          _that.usage,
          _that.ocspStapling,
          _that.oneTimeLoading,
          _that.buildChain);
    case _:
      return null;
  }
}