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: manager.rs
    path of file: ./repos/krill/src/pubd
    
    the code of the file until where you have to start completion: use std::sync::Arc;

use bytes::Bytes;

use rpki::{
    ca::{
        idexchange,
        idexchange::{PublisherHandle, RepoInfo},
        publication,
        publication::{ListReply, PublishDelta},
    },
   
    
    fn should_not_add_publisher_twice() {
        // we need a disk, as repo_dir, etc. use data_dir by default
        let (data_dir, cleanup) = test::tmp_dir();
        let storage_uri = test::mem_storage();

        let server = make_server(&storage_uri, &data_dir);

        let alice = publisher_alice(&storage_uri);

        let alice_handle = Handle::from_str("alice").unwrap();
        let publisher_req = make_publisher_req(alice_handle.as_str(), alice.id_cert());

        let actor = Actor::actor_from_def(ACTOR_DEF_TEST);
        server.create_publisher(publisher_req.clone(), &actor).unwrap();

        match server.create_publisher(publisher_req, &actor) {
            Err(Error::PublisherDuplicate(name)) => assert_eq!(name, alice_handle),
            _ => panic!("Expected error"),
        }

        cleanup();
    }