whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. String id,
    2. String userId,
    3. String kind,
    4. String? topicId,
    5. String? chunkId,
    6. String? sessionId,
    7. String? note,
    8. DateTime createdAt,
    )?
)

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 id, @JsonKey(name: 'user_id')  String userId,  String kind, @JsonKey(name: 'topic_id')  String? topicId, @JsonKey(name: 'chunk_id')  String? chunkId, @JsonKey(name: 'session_id')  String? sessionId,  String? note, @JsonKey(name: 'created_at')  DateTime createdAt)?  $default,) {final _that = this;
switch (_that) {
case _BookmarkModel() when $default != null:
return $default(_that.id,_that.userId,_that.kind,_that.topicId,_that.chunkId,_that.sessionId,_that.note,_that.createdAt);case _:
  return null;

}
}