You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: trace.rs
    path of file: ./repos/turbo/crates/turbopack-node/src/source_map
    
    the code of the file until where you have to start completion: use std::{borrow::Cow, fmt::Display};

use anyhow::Result;
use mime::APPLICATION_JSON;
use serde::{Deserialize, Serialize};
use serde_json::json;
use
    
    pub async fn content(self: Vc<Self>) -> Result<Vc<AssetContent>> {
        let trace = self.trace().await?;
        let result = match &*trace {
            // purposefully invalid JSON (it can't be empty), so that the catch handler will default
            // to the generated stack frame.
            TraceResult::NotFound => "".to_string(),
            TraceResult::Found(frame) => json!({
                "originalStackFrame": frame,
                // TODO
                "originalCodeFrame": null,
            })
            .to_string(),
        };
        let file = File::from(result).with_content_type(APPLICATION_JSON);
        Ok(AssetContent::file(file.into()))
    }