// https://streams.spec.whatwg.org/#readablestreamdefaultreader
[Exposed=*]
interface ReadableStreamDefaultReader {
    constructor(ReadableStream stream);

    Promise<ReadableStreamReadResult> read();
    undefined releaseLock();
};
ReadableStreamDefaultReader includes ReadableStreamGenericReader;

dictionary ReadableStreamReadResult {
    any value;
    boolean done;
};
