whenOrNull<TResult extends Object?> method Null safety

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. {TResult initial(
      )?,
    1. TResult inProgress(
        )?,
      1. TResult success(
        1. Album album
        )?,
      2. TResult failure(
        1. Failure failure
        )?}
      )
      @optionalTypeArgs, inherited

      Implementation

      @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>({
  TResult Function()? initial,
  TResult Function()? inProgress,
  TResult Function(Album album)? success,
  TResult Function(Failure failure)? failure,
}) =>
    throw _privateConstructorUsedError;