src/vs/workbench/electron-browser/desktop.main.ts/DesktopMain/registerFileSystemProviders
class DesktopMain:	protected registerFileSystemProviders(environmentService: INativeWorkbenchEnvironmentService, fileService: IFileService, logService: ILogService, nativeHostService: INativeHostService): void {

		// Local Files
		const diskFileSystemProvider = this._register(new DiskFileSystemProvider(logService, nativeHostService));
		fileService.registerProvider(Schemas.file, diskFileSystemProvider);

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