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: code_gen.rs
    path of file: ./repos/mun/crates/mun_codegen/src
    
    the code of the file until where you have to start completion: pub use assembly_builder::AssemblyBuilder;
pub use context::CodeGenContext;
pub
    
fn optimize_module(module: &Module<'_>, optimization_lvl: OptimizationLevel) {
    let pass_builder = PassManagerBuilder::create();
    pass_builder.set_optimization_level(optimization_lvl);

    let module_pass_manager = PassManager::create(());
    pass_builder.populate_module_pass_manager(&module_pass_manager);
    module_pass_manager.run_on(module);
}