[Question] different appbar actions based on state / StoreConnector ?

[matanshukry]

I have a situation where I want to display different app bar actions based on StoreConnector.
However, I don't want to build the entire Scaffold when the state changes, only the AppBar.

Options I tried / thought of:

1. Since StoreConnector isn't a PreferredSizeWidget, which is what the appBar argument to Scaffold expect, I can't wrap the entire appbar.
2. The actions argument expect a list, so I can't wrap that either.
3. I thought on making a StoreConnector for each possible action, even though that may be null, but we can't return null; so that's not an option.

Example of what I would of wanted

    return Scaffold(
      appBar: StoreConnector<AppState, AuthState>(
        converter: (appState) => appState.state.auth,
        builder: (context, auth) {
          List<Widget> widgets = [];
          if (auth.isLoggedIn) {
            widgets.add(Icon(Icons.star));
          }
          widgets.add(PopupMenuButton<Object>(...));
          return AppBar(title: 'MyApp', actions: actions);
        },
      body: ...
      ),
    );

What should I do about it?