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: filesystem.rs
    path of file: ./repos/wasmer/lib/wasix/src/runtime/module_cache
    
    the code of the file until where you have to start completion: use std::path::{Path, PathBuf};
use std::sync::Arc;

use tempfile::NamedTempFile;
use tokio::io::AsyncWriteExt;
use wasmer::{Engine, Module};

use crate::runtime::module_cache::{CacheError, ModuleCache, ModuleHash};
use crate::runtime::task_manager::tokio::TokioTaskManager;
use crate::runtime::task_manager::VirtualTaskManagerExt;

/// A cache that saves modules to a folder on the host filesystem using
/// [`Module::serialize()`].
#[derive(Debug, Clone)]
pub struct FileSystemCache {
    cache_dir: PathBuf,
    task_manager: Arc<Tok
    
    async fn can_still_load_lzw_compressed_binaries() {
        let temp = TempDir::new().unwrap();
        let engine = Engine::default();
        let module = Module::new(&engine, ADD_WAT).unwrap();
        let key = ModuleHash::from_bytes([0; 8]);
        let cache = FileSystemCache::new(temp.path(), create_tokio_task_manager());
        let expected_path = cache.path(key, engine.deterministic_id());
        std::fs::create_dir_all(expected_path.parent().unwrap()).unwrap();
        let serialized = module.serialize().unwrap();
        let mut encoder = weezl::encode::Encoder::new(weezl::BitOrder::Msb, 8);
        std::fs::write(&expected_path, encoder.encode(&serialized).unwrap()).unwrap();

        let module = cache.load(key, &engine).await.unwrap();

        let exports: Vec<_> = module
            .exports()
            .map(|export| export.name().to_string())
            .collect();
        assert_eq!(exports, ["add"]);
    }