Function resident_bytes_does_not_panic

nodedb-mem/src/collection_arena.rs:211–216

()

    #[test]
    fn resident_bytes_does_not_panic() {
        let reg = CollectionArenaRegistry::new();
        let h = reg.get_or_create(1, "test_resident").expect("create");
        // Must not panic; may return None when stats are unavailable.
        let _ = h.resident_bytes();
    }
}