mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? pending(
    1. RevenueWithdrawalStatePending value
    )?,
  2. TResult? succeeded(
    1. RevenueWithdrawalStateSucceeded value
    )?,
  3. TResult? failed(
    1. RevenueWithdrawalStateFailed value
    )?,
})

A variant of map that fallback to returning null.

It is equivalent to doing:

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

Implementation

@optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  TResult? Function(RevenueWithdrawalStatePending value)? pending,
  TResult? Function(RevenueWithdrawalStateSucceeded value)? succeeded,
  TResult? Function(RevenueWithdrawalStateFailed value)? failed,
}) {
  final _that = this;
  switch (_that) {
    case RevenueWithdrawalStatePending() when pending != null:
      return pending(_that);
    case RevenueWithdrawalStateSucceeded() when succeeded != null:
      return succeeded(_that);
    case RevenueWithdrawalStateFailed() when failed != null:
      return failed(_that);
    case _:
      return null;
  }
}