ReadableByteStreamController
interface ReadableByteStreamController {
readonly byobRequest: ReadableStreamBYOBRequest | null;
readonly desiredSize: number | null;
close(): void;
enqueue(chunk: ArrayBufferView): void;
error(e?: any): void;
}var ReadableByteStreamController: {
prototype: ReadableByteStreamController;
new (): ReadableByteStreamController;
};