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: geoip.rs
    path of file: ./repos/sn0int/src/runtime
    
    the code of the file until where you have to start completion: use crate::errors::*;

use crate::engine::ctx::State;
use crate::json::LuaJsonValue;
use crate::hlua::{self, AnyLuaValue};
use std::sync::Arc;
use std::net::IpAddr;


pub fn asn_l
    
pub fn asn_lookup(lua: &mut hlua::Lua, state: Arc<dyn State>) {
    lua.set("asn_lookup", hlua::function1(move |ip: String| -> Result<AnyLuaValue> {
        let asn = state.asn()
            .map_err(|err| state.set_error(err))?;

        let ip = ip.parse::<IpAddr>()
            .context("Failed to parse IP")
            .map_err(|err| state.set_error(err.into()))?;

        let lookup = asn.lookup(ip)
            .map_err(|err| state.set_error(err))?;

        let lookup = serde_json::to_value(lookup)
            .map_err(|e| state.set_error(e.into()))?;

        Ok(LuaJsonValue::from(lookup).into())
    }))
}