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: gc.rs
    path of file: ./repos/ruruby/ruruby/src/builtin
    
    the code of the file until where you have to start completion: use crate::*;

pub(crate) fn init(globals: &mut Globals) -> Value {
    let class = Mod
    
    fn gc_module() {
        let program = r#"
            GC.count
            a = []
            10000.times do |x|
                a << x.to_s
            end
            GC.stat
            a = nil
            GC.start
            GC.print_mark
            GC.disable
            GC.enable
        "#;
        assert_script(program);
    }