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: raycast.rs
    path of file: ./repos/navi/src/deser
    
    the code of the file until where you have to start completion: use super::*;
use crate::structures::item::Item;

const FIELD_SEP_ESCAPE_CHAR: char = '\x16';

pub fn write(item: &Item) -> String {
    format!(
        "{hash}{delimiter}{tags}{delimiter}{comment}{delimiter}{icon}{delimiter}{snippet}\n",
        hash = item.hash(),
        tags = item.tags,
        comment = item.comment,
        delimiter = FIELD_SEP_ESCAPE_CHAR,
        icon = item.icon
    
pub fn read(line: &str) -> Result<Item> {
    let mut parts = line.split(FIELD_SEP_ESCAPE_CHAR);
    let hash: u64 = parts
        .next()
        .context("no hash")?
        .parse()
        .context("hash not a u64")?;
    let tags = parts.next().context("no tags")?.into();
    let comment = parts.next().context("no comment")?.into();
    let icon_str = parts.next().context("no icon")?;
    let snippet = parts.next().context("no snippet")?.into();

    let icon = if icon_str.is_empty() {
        None
    } else {
        Some(icon_str.into())
    };

    let item = Item {
        tags,
        comment,
        icon,
        snippet,
        ..Default::default()
    };

    if item.hash() != hash {
        dbg!(&item.hash());
        dbg!(hash);
        Err(anyhow!("Incorrect hash"))
    } else {
        Ok(item)
    }
}