如何在Guice中创建使用带标志的构造函数的单例？

import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import com.google.inject.name.Named;

public class GuiceSingletonExample {
    
    public static void main(String[] args) {
        Injector injector = Guice.createInjector(new MyModule());
        MySingleton singleton = injector.getInstance(MySingleton.class);
        singleton.doSomething();
    }
    
    public static class MySingleton {
        private final String flag;
        
        @Inject
        public MySingleton(@Named("flag") String flag) {
            this.flag = flag;
        }
        
        public void doSomething() {
            System.out.println("Singleton with flag: " + flag);
        }
    }
    
    public static class MyModule extends AbstractModule {
        @Override
        protected void configure() {
            bind(String.class).annotatedWith(Named.class).toInstance("example");
            bind(MySingleton.class).in(Singleton.class);
            bind(MySingletonProvider.class);
        }
    }
    
    public static class MySingletonProvider implements Provider<MySingleton> {
        private final MySingleton singleton;
        
        @Inject
        public MySingletonProvider(@Named("flag") String flag) {
            this.singleton = new MySingleton(flag);
        }
        
        @Override
        public MySingleton get() {
            return singleton;
        }
    }
}