在使用Serde进行序列化时，有没有一种方法可以对结构的字段进行分组，就像"flatten“属性的倒数一样？

use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize)]
struct Person {
    name: String,
    #[serde(flatten)]
    address: Address,
}

#[derive(Serialize, Deserialize)]
struct Address {
    street: String,
    city: String,
    country: String,
}

fn main() {
    let person = Person {
        name: "John".to_string(),
        address: Address {
            street: "123 Main St".to_string(),
            city: "New York".to_string(),
            country: "USA".to_string(),
        },
    };

    let serialized = serde_json::to_string(&person).unwrap();
    println!("Serialized: {}", serialized);

    let deserialized: Person = serde_json::from_str(&serialized).unwrap();
    println!("Deserialized: {:?}", deserialized);
}