whenOrNull<TResult extends Object?> method

@optionalTypeArgs TResult? whenOrNull<TResult extends Object?>(TResult? $default(Metadata day, Metadata month, Metadata all, Map<String, dynamic>? $unknown,)?)

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(@MetadataConverter()  Metadata day, @MetadataConverter()  Metadata month, @MetadataConverter()  Metadata all,  Map<String, dynamic>? $unknown)?  $default,) {final _that = this;
switch (_that) {
case _ModerationGetActorMetadataOutput() when $default != null:
return $default(_that.day,_that.month,_that.all,_that.$unknown);case _:
  return null;

}
}