simple-rust-tests/__network/fetch-rs

let response = fetch(
    "https://hatter.ink/util/print_request.action",
    &FetchOptions::default())?;

let response = fetch(
    "https://hatter.ink/util/print_request.action",
    &FetchOptions {
        method: FetchMethod::Put,
        body: Some("{}".as_bytes().to_vec()),
        ..Default::default()
    })?;

let response = fetch(
    "https://hatter.ink/util/print_request.action",
    &FetchOptions {
        method: FetchMethod::Post,
        headers: vec![
            FetchHeader {
                key: "content-type".to_string(),
                value: "application/json".to_string(),
            }
        ],
        body: Some("{}".as_bytes().to_vec()),
        ..Default::default()
    })?;