pub fn read_json(
  response: response.Response(fetch.FetchBody),
) -> promise.Promise(
  Result(response.Response(dynamic.Dynamic), snag.Snag),
)

pub fn read_text(
  response: response.Response(fetch.FetchBody),
) -> promise.Promise(Result(response.Response(String), snag.Snag))

pub fn send(
  request: request.Request(String),
) -> promise.Promise(
  Result(response.Response(fetch.FetchBody), snag.Snag),
)