src/vs/workbench/electron-sandbox/desktop.main.ts/DesktopMain/registerFileSystemProviders
class DesktopMain:	protected registerFileSystemProviders(environmentService: INativeWorkbenchEnvironmentService, fileService: IFileService, logService: ILogService): Promise<void> {

		// Local Files
		fileService.registerProvider(Schemas.file, simpleFileSystemProvider);

		// User Data Provider
		fileService.registerProvider(Schemas.userData, new FileUserDataProvider(Schemas.file, simpleFileSystemProvider, Schemas.userData, logService));

		// Init our in-memory file system
		return initFileSystem(environmentService, fileService);
	}