maybeWhen<TResult extends Object?> method Null safety

  1. @optionalTypeArgs
TResult maybeWhen<TResult extends Object?>(
  1. {TResult undo(
      )?,
    1. TResult readyNextRound(
      1. String player
      )?,
    2. TResult message(
      1. String message,
      2. String from,
      3. String? to
      )?,
    3. required TResult orElse(
        )}
      )
      @optionalTypeArgs, inherited

      Implementation

      @optionalTypeArgs
      TResult maybeWhen<TResult extends Object?>({
        TResult Function()? undo,
        TResult Function(String player)? readyNextRound,
        TResult Function(String message, String from, String? to)? message,
        required TResult orElse(),
      }) =>
          throw _privateConstructorUsedError;