> new Response(null)
Response {
  [Symbol(realm)]: { settingsObject: {} },
  [Symbol(state)]: {
    aborted: false,
    rangeRequested: false,
    timingAllowPassed: false,
    requestIncludesCredentials: false,
    type: 'default',
    status: 200,
    timingInfo: null,
    cacheState: '',
    statusText: '',
    headersList: HeadersList {
      cookies: null,
      [Symbol(headers map)]: Map(0) {},
      [Symbol(headers map sorted)]: null
    },
    urlList: []
  },
  [Symbol(headers)]: HeadersList {
    cookies: null,
    [Symbol(headers map)]: Map(0) {},
    [Symbol(headers map sorted)]: null
  }
}

> new Headers()
HeadersList {
  cookies: null,
  [Symbol(headers map)]: Map(0) {},
  [Symbol(headers map sorted)]: null
}

> new Request('http://a')
Request {
  [Symbol(realm)]: {
    settingsObject: { baseUrl: undefined, origin: [Getter], policyContainer: [Object] }
  },
  [Symbol(state)]: {
    method: 'GET',
    localURLsOnly: false,
    unsafeRequest: false,
    body: null,
    client: { baseUrl: undefined, origin: [Getter], policyContainer: [Object] },
    reservedClient: null,
    replacesClientId: '',
    window: 'client',
    keepalive: false,
    serviceWorkers: 'all',
    initiator: '',
    destination: '',
    priority: null,
    origin: 'client',
    policyContainer: 'client',
    referrer: 'client',
    referrerPolicy: '',
    mode: 'cors',
    useCORSPreflightFlag: false,
    credentials: 'same-origin',
    useCredentials: false,
    cache: 'default',
    redirect: 'follow',
    integrity: '',
    cryptoGraphicsNonceMetadata: '',
    parserMetadata: '',
    reloadNavigation: false,
    historyNavigation: false,
    userActivation: false,
    taintedOrigin: false,
    redirectCount: 0,
    responseTainting: 'basic',
    preventNoCacheCacheControlHeaderModification: false,
    done: false,
    timingAllowFailed: false,
    headersList: HeadersList {
      cookies: null,
      [Symbol(headers map)]: Map(0) {},
      [Symbol(headers map sorted)]: null
    },
    urlList: [ [URL] ],
    url: URL {
      href: 'http://a/',
      origin: 'http://a',
      protocol: 'http:',
      username: '',
      password: '',
      host: 'a',
      hostname: 'a',
      port: '',
      pathname: '/',
      search: '',
      searchParams: URLSearchParams {},
      hash: ''
    }
  },
  [Symbol(signal)]: AbortSignal { aborted: false },
  [Symbol(headers)]: HeadersList {
    cookies: null,
    [Symbol(headers map)]: Map(0) {},
    [Symbol(headers map sorted)]: null
  }
}

> a = new FormData()
FormData { [Symbol(state)]: [] }
> a.append('a', 'b')
undefined
> a
FormData { [Symbol(state)]: [ { name: 'a', value: 'b' } ] }