src/vs/workbench/services/extensions/browser/webWorkerFileSystemProvider.ts/FetchFileSystemProvider/readFile
class FetchFileSystemProvider:	async readFile(resource: URI): Promise<Uint8Array> {
		try {
			const res = await fetch(resource.toString(true));
			if (res.status === 200) {
				return new Uint8Array(await res.arrayBuffer());
			}
			throw new FileSystemProviderError(res.statusText, FileSystemProviderErrorCode.Unknown);
		} catch (err) {
			throw new FileSystemProviderError(err, FileSystemProviderErrorCode.Unknown);
		}
	}