whenOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? whenOrNull<TResult extends Object?>(
  1. TResult? $default(
    1. TransactionId id,
    2. TransactionId? prevTransactionId,
    3. DateTime createdAt,
    4. bool aborted,
    5. int? exitCode,
    6. int? resultCode,
    7. AccountStatus origStatus,
    8. AccountStatus endStatus,
    9. BigInt totalFees,
    10. Message inMessage,
    11. List<Message> outMessages,
    12. String? boc,
    )?
)

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( TransactionId id,  TransactionId? prevTransactionId, @dateSecondsSinceEpochJsonConverter  DateTime createdAt,  bool aborted, @JsonKey(includeIfNull: false)  int? exitCode, @JsonKey(includeIfNull: false)  int? resultCode,  AccountStatus origStatus,  AccountStatus endStatus,  BigInt totalFees,  Message inMessage,  List<Message> outMessages,  String? boc)?  $default,) {final _that = this;
switch (_that) {
case _Transaction() when $default != null:
return $default(_that.id,_that.prevTransactionId,_that.createdAt,_that.aborted,_that.exitCode,_that.resultCode,_that.origStatus,_that.endStatus,_that.totalFees,_that.inMessage,_that.outMessages,_that.boc);case _:
  return null;

}
}