ReadableStream.DefaultReader
include Reader;
type t
type closed
let closed: t => Js.Promise.t(closed);
let cancel: t => Js.Promise.t(unit);
let cancelWith: string => t => Js.Promise.t(string);
let releaseLock: t => unit;
let read: t => Js.Promise.t(Fetch__Iterator.Next.t(string));