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: testing.rs
    path of file: ./repos/wasmtime/crates/wasi-nn/src
    
    the code of the file until where you have to start completion: //! This is testing-specific code--it is public only so that it can be
//! accessible both in unit and integration tests.
//!
//! This module checks:
//! - 
    
fn check_openvino_artifacts_are_available() -> Result<()> {
    let _exclusively_retrieve_artifacts = ARTIFACTS.lock().unwrap();
    const BASE_URL: &str =
        "https://github.com/intel/openvino-rs/raw/main/crates/openvino/tests/fixtures/mobilenet";
    let artifacts_dir = artifacts_dir();
    if !artifacts_dir.is_dir() {
        fs::create_dir(&artifacts_dir)?;
    }
    for (from, to) in [
        ("mobilenet.bin", "model.bin"),
        ("mobilenet.xml", "model.xml"),
        ("tensor-1x224x224x3-f32.bgr", "tensor.bgr"),
    ] {
        let remote_url = [BASE_URL, from].join("/");
        let local_path = artifacts_dir.join(to);
        if !local_path.is_file() {
            download(&remote_url, &local_path)
                .with_context(|| "unable to retrieve test artifact")?;
        } else {
            println!("> using cached artifact: {}", local_path.display())
        }
    }
    Ok(())
}