use rlua::prelude::*;use ulid::Ulid;pub fn init(lua: &Lua) -> crate::Result<()> {    let module = lua.create_table()?;    module.set("new", lua.create_function(|_, _: ()| {        Ok(Ulid::new().to_string())    })?)?;    lua.globals().set("ulid", module)?;    Ok(())}