有没有办法使用Rust的serde / serde_json来“修补”一个结构？

use serde::{Deserialize, Deserializer, Serialize, Serializer};
use serde_json::Value;

#[derive(Debug, Serialize, Deserialize)]
struct MyStruct {
    field1: String,
    field2: i32,
}

fn patch_struct<'de, D>(deserializer: D) -> Result<MyStruct, D::Error>
where
    D: Deserializer<'de>,
{
    let mut struct_value: Value = Deserialize::deserialize(deserializer)?;
    
    // Perform the patching logic here
    // For example, add a new field to the struct
    struct_value["field3"] = Value::String("value3".to_string());

    // Deserialize the patched struct
    let patched_struct: MyStruct = serde_json::from_value(struct_value)?;

    Ok(patched_struct)
}

fn main() {
    let json = r#"
        {
            "field1": "value1",
            "field2": 42
        }
    "#;

    let patched_struct: MyStruct = serde_json::from_str(json)
        .unwrap_or_else(|_| panic!("Failed to deserialize JSON"));

    println!("{:?}", patched_struct);
}