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: shadowroot.rs
    path of file: ./repos/thirtyfour/thirtyfour/examples
    
    the code of the file until where you have to start completion: //! Requires chromedriver running on port 9515:
//!
//!     chromedriver --port=9515
//!
//! Run as follows:
//!
//!     cargo run --example shadowroot

use thirtyfo
    
async fn main() -> color_eyre::Result<()> {
    color_eyre::install()?;
    std::env::set_var("RUST_BACKTRACE", "1");

    let caps = DesiredCapabilities::chrome();
    let driver = WebDriver::new("http://localhost:9515", caps).await?;

    // Navigate to website containing example shadowroot.
    driver.goto("https://web.dev/shadowdom-v1/").await?;

    let elem = driver.query(By::Tag("iframe")).first().await?;
    elem.enter_frame().await?;

    // Get the element containing the shadow root node.
    let elem = driver.query(By::Tag("fancy-tabs")).first().await?;
    // Now get the shadow root node itself.
    let root = elem.get_shadow_root().await?;

    // Now we can search for elements nested below the shadow root node.
    let tabs = root.query(By::Id("tabsSlot")).first().await?;
    let name = tabs.prop("name").await?;
    assert!(name.is_some());
    assert_eq!(name.unwrap(), "title");

    // Always explicitly close the browser. There are no async destructors.
    driver.quit().await?;

    Ok(())
}