dart 中的@protected 是什么意思

Question

正如開發文檔所說， Dart doesn't have the keywords public, protected, and private. If an identifier starts with an underscore (_), it's private to its library. Dart doesn't have the keywords public, protected, and private. If an identifier starts with an underscore (_), it's private to its library. 但是我在 Flutter 框架中發現了很多@protected關鍵字。 @protected是什么意思？

abstract class InheritedWidget extends ProxyWidget {
  const InheritedWidget({ Key key, Widget child })
    : super(key: key, child: child);

  @override
  InheritedElement createElement() => InheritedElement(this);

  @protected
  bool updateShouldNotify(covariant InheritedWidget oldWidget);
}

Answer 1

當 Dart Analyzer 在子類之外使用成員時，它用於提供提示。

你可以在這里找到問題。