maybeWhen<TResult extends Object?> method

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>({ TResult openUrl(String url, String label, bool openInApp, String style,)?, TResult sendMessage(String message, String label, bool showInChat, String style,)?, TResult callback(String callbackId, String label, Map<String, dynamic>? payload, String style,)?, required TResult orElse(), })

A variant of when that fallback to an orElse callback.

It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case _:
    return orElse();
}

Implementation

@optionalTypeArgs TResult maybeWhen<TResult extends Object?>({TResult Function( String url,  String label, @JsonKey(name: 'open_in_app')  bool openInApp,  String style)?  openUrl,TResult Function( String message,  String label, @JsonKey(name: 'show_in_chat')  bool showInChat,  String style)?  sendMessage,TResult Function(@JsonKey(name: 'callback_id')  String callbackId,  String label,  Map<String, dynamic>? payload,  String style)?  callback,required TResult orElse(),}) {final _that = this;
switch (_that) {
case OpenUrlAction() when openUrl != null:
return openUrl(_that.url,_that.label,_that.openInApp,_that.style);case SendMessageAction() when sendMessage != null:
return sendMessage(_that.message,_that.label,_that.showInChat,_that.style);case CallbackAction() when callback != null:
return callback(_that.callbackId,_that.label,_that.payload,_that.style);case _:
  return orElse();

}
}