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: cast.rs
    path of file: ./repos/windows-rs/crates/tests/winrt/tests
    
    the code of the file until where you have to start completion: use windows::core::{Interface, Result};
use windows::Foundation::{IClosable, IStringable, Uri};

#[test]
fn try_into() -> Result<()> {
    let uri = Uri::CreateUri(&windows::core::HSTRING::from("http://kennykerr.ca"))?;


    
fn try_into() -> Result<()> {
    let uri = Uri::CreateUri(&windows::core::HSTRING::from("http://kennykerr.ca"))?;

    // Implicit cast to IStringable should work.
    assert!(uri.ToString()? == "http://kennykerr.ca/");

    // Uri implements IStringable so this cast should succeed.
    let s: Result<IStringable> = uri.cast();
    assert!(s.unwrap().ToString()? == "http://kennykerr.ca/");

    // Uri does not implement IClosable so this should fail.
    let c: Result<IClosable> = uri.cast();
    assert!(c.is_err());

    // And we should be able to cast an interface for a class and it should use
    // its default interface GUID to resolve the cast.
    let s: IStringable = uri.cast()?;
    let uri: Uri = s.cast()?;
    assert!(uri.Domain()? == "kennykerr.ca");

    Ok(())
}