src/vs/platform/files/node/diskFileSystemProvider.ts/DiskFileSystemProvider/readFileStream
class DiskFileSystemProvider:	readFileStream(resource: URI, opts: IFileReadStreamOptions, token: CancellationToken): ReadableStreamEvents<Uint8Array> {
		const stream = newWriteableStream<Uint8Array>(data => VSBuffer.concat(data.map(data => VSBuffer.wrap(data))).buffer);

		readFileIntoStream(this, resource, stream, data => data.buffer, {
			...opts,
			bufferSize: 256 * 1024 // read into chunks of 256kb each to reduce IPC overhead
		}, token);

		return stream;
	}