How to use the systemjs/dist/system.js.import function in systemjs

export function importPluginModule(path: string): Promise {
  const builtIn = builtInPlugins[path];
  if (builtIn) {
    return Promise.resolve(builtIn);
  }
  return System.import(path);
}

export function loadPluginCss(options) {
  if (config.bootData.user.lightTheme) {
    System.import(options.light + '!css');
  } else {
    System.import(options.dark + '!css');
  }
}

export function importPluginModule(path: string): Promise {
  let builtIn = builtInPlugins[path];
  if (builtIn) {
    return Promise.resolve(builtIn);
  }
  return System.import(path);
}

export function loadPluginCss(options) {
  if (config.bootData.user.lightTheme) {
    System.import(options.light + '!css');
  } else {
    System.import(options.dark + '!css');
  }
}