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: immutable_modules.rs
    path of file: ./repos/farm/crates/core/src/cache/module_cache
    
    the code of the file until where you have to start completion: use std::collections::{HashMap, HashSet};

use dashmap::DashMap;
use farmfe_macro_cache_item::cache_item
    
  fn read_cached_package(&self, package_key: &str) -> CachedPackage {
    let cache = self
      .store
      .read_cache(package_key)
      .expect("Cache broken, please remove node_modules/.farm and retry.");

    crate::deserialize!(&cache, CachedPackage)
  }