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: stream_fuse.rs
    path of file: ./repos/tokio/tokio-stream/tests
    
    the code of the file until where you have to start completion: use tokio_stream::{Stream, StreamExt};

use std::pin::Pin;
use std::ta
    
async fn basic_usage() {
    let mut stream = Alternate { state: 0 };

    // the stream goes back and forth
    assert_eq!(stream.next().await, Some(0));
    assert_eq!(stream.next().await, None);
    assert_eq!(stream.next().await, Some(2));
    assert_eq!(stream.next().await, None);

    // however, once it is fused
    let mut stream = stream.fuse();

    assert_eq!(stream.size_hint(), (0, None));
    assert_eq!(stream.next().await, Some(4));

    assert_eq!(stream.size_hint(), (0, None));
    assert_eq!(stream.next().await, None);

    // it will always return `None` after the first time.
    assert_eq!(stream.size_hint(), (0, Some(0)));
    assert_eq!(stream.next().await, None);
    assert_eq!(stream.size_hint(), (0, Some(0)));
}