map<TResult extends Object?> method

@optionalTypeArgs TResult map<TResult extends Object?>({ required TResult user(MessageOriginUser value), required TResult hiddenUser(MessageOriginHiddenUser value), required TResult chat(MessageOriginChat value), required TResult channel(MessageOriginChannel value), })

A switch-like method, using callbacks.

Callbacks receives the raw object, upcasted. It is equivalent to doing:

switch (sealedClass) {
  case final Subclass value:
    return ...;
  case final Subclass2 value:
    return ...;
}

Implementation

@optionalTypeArgs
TResult map<TResult extends Object?>({
  required TResult Function(MessageOriginUser value) user,
  required TResult Function(MessageOriginHiddenUser value) hiddenUser,
  required TResult Function(MessageOriginChat value) chat,
  required TResult Function(MessageOriginChannel value) channel,
}) {
  final _that = this;
  switch (_that) {
    case MessageOriginUser():
      return user(_that);
    case MessageOriginHiddenUser():
      return hiddenUser(_that);
    case MessageOriginChat():
      return chat(_that);
    case MessageOriginChannel():
      return channel(_that);
  }
}