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: report.rs
    path of file: ./repos/human-panic/src
    
    the code of the file until where you have to start completion: //! This module encapsulates the report of a failure event.
//!
//! A `Report` contains the metadata collected about the event
//! to construct a helpful error message.

use backtrace::Backtrace;
use serde_derive::Serialize;
use s
    
    pub fn persist(&self) -> Result<PathBuf, Box<dyn Error + 'static>> {
        let uuid = Uuid::new_v4().hyphenated().to_string();
        let tmp_dir = env::temp_dir();
        let file_name = format!("report-{}.toml", &uuid);
        let file_path = Path::new(&tmp_dir).join(file_name);
        let mut file = File::create(&file_path)?;
        let toml = self.serialize().unwrap();
        file.write_all(toml.as_bytes())?;
        Ok(file_path)
    }