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: list.rs
    path of file: ./repos/crossbeam/crossbeam-epoch/src/sync
    
    the code of the file until where you have to start completion: //! Lock-free intrusive linked list.
//!
//! Ideas from Mich
    
    fn delete() {
        let collector = Collector::new();
        let handle = collector.register();
        let guard = handle.pin();

        let l: List<Entry> = List::new();

        let e1 = Owned::new(Entry::default()).into_shared(&guard);
        let e2 = Owned::new(Entry::default()).into_shared(&guard);
        let e3 = Owned::new(Entry::default()).into_shared(&guard);
        unsafe {
            l.insert(e1, &guard);
            l.insert(e2, &guard);
            l.insert(e3, &guard);
            e2.as_ref().unwrap().delete(&guard);
        }

        let mut iter = l.iter(&guard);
        let maybe_e3 = iter.next();
        assert!(maybe_e3.is_some());
        assert!(maybe_e3.unwrap().unwrap() as *const Entry == e3.as_raw());
        let maybe_e1 = iter.next();
        assert!(maybe_e1.is_some());
        assert!(maybe_e1.unwrap().unwrap() as *const Entry == e1.as_raw());
        assert!(iter.next().is_none());

        unsafe {
            e1.as_ref().unwrap().delete(&guard);
            e3.as_ref().unwrap().delete(&guard);
        }

        let mut iter = l.iter(&guard);
        assert!(iter.next().is_none());
    }