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: test_aio.rs
    path of file: ./repos/nix/test/sys
    
    the code of the file until where you have to start completion: use std::{
    io::{Read, Seek, Write},
    ops::Deref,
    os::unix::io::AsRawFd,
    pin
    
    fn test_accessors() {
        let wbuf0 = vec![0; 4];
        let wbuf1 = vec![0; 8];
        let wbufs = [IoSlice::new(&wbuf0), IoSlice::new(&wbuf1)];
        let aiocb = AioWritev::new(
            1001,
            2, //offset
            &wbufs,
            42, //priority
            SigevNotify::SigevSignal {
                signal: Signal::SIGUSR2,
                si_value: 99,
            },
        );
        assert_eq!(1001, aiocb.fd());
        assert_eq!(2, aiocb.iovlen());
        assert_eq!(2, aiocb.offset());
        assert_eq!(42, aiocb.priority());
        let sev = aiocb.sigevent().sigevent();
        assert_eq!(Signal::SIGUSR2 as i32, sev.sigev_signo);
        assert_eq!(99, sev.sigev_value.sival_ptr as i64);
    }