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: storage.rs
    path of file: ./repos/teloxide/crates/teloxide/src/dispatching/dialogue
    
    the code of the file until where you have to start completion: pub mod serializer;

mod in_mem_storage;
mod trace_storage;

#[cfg(feature = "redis-storage")]
mod redis_storage;


    
    async fn test_erased() {
        let chat_id = ChatId(123);

        let erased = InMemStorage::new().erase();
        Arc::clone(&erased).update_dialogue(chat_id, 1).await.unwrap();
        assert_eq!(Arc::clone(&erased).get_dialogue(chat_id).await.unwrap().unwrap(), 1);
        Arc::clone(&erased).remove_dialogue(chat_id).await.unwrap();
        assert_eq!(Arc::clone(&erased).get_dialogue(chat_id).await.unwrap(), None);
    }