如何使用Objectify在Java GAE的void函数中设置事务？

import com.googlecode.objectify.ObjectifyFactory;
import com.googlecode.objectify.ObjectifyService;
import com.googlecode.objectify.annotation.Entity;
import com.googlecode.objectify.annotation.Id;
import com.googlecode.objectify.annotation.Transient;
import com.googlecode.objectify.annotation.Index;
import com.googlecode.objectify.annotation.Load;
import com.googlecode.objectify.annotation.Parent;
import com.googlecode.objectify.annotation.Ignore;
import com.googlecode.objectify.annotation.Subclass;

import static com.googlecode.objectify.ObjectifyService.ofy;

@Entity
public class MyEntity {
    @Id private Long id;
    @Index private String name;
    // Other properties and methods

    public static void myVoidFunction() {
        // Start a transaction
        ofy().transact(() -> {
            // Perform operations within the transaction
            MyEntity entity = new MyEntity();
            entity.setName("Example");
            ofy().save().entity(entity).now();
        });
    }
}

public class MyObjectifyFactory extends ObjectifyFactory {
    public MyObjectifyFactory() {
        register(MyEntity.class);
    }
}

// In your application startup code
ObjectifyService.init(new MyObjectifyFactory());