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: lib.rs
    path of file: ./repos/stc/crates/stc_ts_type_checker/src
    
    the code of the file until where you have to start completion: //! Full type checker with dependency support.

use std::{mem::take, sync::Arc};

use dashmap::{DashMap, DashSet, SharedValue};
use fxhash::{FxBuildHasher, FxHashMap};
use loader::LoadModule;
use once_cell::sync::OnceCell;
use parking_lot::{Mute
    
    fn declare_module(&self, name: &JsWord, module: Type) -> ModuleId {
        module.assert_clone_cheap();

        let module_id = self
            .module_loader
            .load_module(&Arc::new(FileName::Custom(name.to_string())), false)
            .unwrap()
            .entry
            .id;

        self.module_types.write().insert(module_id, Arc::new(OnceCell::from(module)));

        info!("Declaring module with type `{}`", name);
        self.declared_modules.insert(name.to_string(), module_id);

        module_id
    }