ReadableStreamBYOBReader
interface ReadableStreamBYOBReader extends ReadableStreamGenericReader {
read(view: ArrayBufferView): Promise<ReadableStreamReadResult<ArrayBufferView>>;
releaseLock(): void;
}var ReadableStreamBYOBReader: {
prototype: ReadableStreamBYOBReader;
new (stream: ReadableStream): ReadableStreamBYOBReader;
};