如何修改使用serde序列化的Result<T、E>的JSON输出？

use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize)]
struct CustomResult<T, E> {
    success: Option<T>,
    error: Option<E>,
}

use serde::{Serialize, Deserialize};
use serde_json::Result;

#[derive(Serialize, Deserialize)]
struct CustomResult<T, E> {
    success: Option<T>,
    error: Option<E>,
}

fn main() -> Result<()> {
    let result: Result<u32, String> = Ok(42);

    let custom_result = CustomResult {
        success: result.ok(),
        error: result.err(),
    };

    let json = serde_json::to_string(&custom_result)?;
    println!("{}", json);

    let deserialized: CustomResult<u32, String> = serde_json::from_str(&json)?;
    println!("{:?}", deserialized);

    Ok(())
}