src/vs/platform/dialogs/electron-main/dialogMainService.ts/DialogMainService/pickFileFolder
class DialogMainService:	pickFileFolder(options: INativeOpenDialogOptions, window?: BrowserWindow): Promise<string[] | undefined> {
		return this.doPick({ ...options, pickFolders: true, pickFiles: true, title: localize('open', "Open") }, window);
	}