maybeMap<TResult extends Object?> method

  1. @optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  1. TResult preview(
    1. PaidMediaPreview value
    )?,
  2. TResult photo(
    1. PaidMediaPhoto value
    )?,
  3. TResult video(
    1. PaidMediaVideo value
    )?,
  4. required TResult orElse(),
})

A variant of map that fallback to returning orElse.

It is equivalent to doing:

switch (sealedClass) {
  case final Subclass value:
    return ...;
  case _:
    return orElse();
}

Implementation

@optionalTypeArgs
TResult maybeMap<TResult extends Object?>({
  TResult Function(PaidMediaPreview value)? preview,
  TResult Function(PaidMediaPhoto value)? photo,
  TResult Function(PaidMediaVideo value)? video,
  required TResult orElse(),
}) {
  final _that = this;
  switch (_that) {
    case PaidMediaPreview() when preview != null:
      return preview(_that);
    case PaidMediaPhoto() when photo != null:
      return photo(_that);
    case PaidMediaVideo() when video != null:
      return video(_that);
    case _:
      return orElse();
  }
}