How to use the @jupyterlab/application.JupyterLab.IInfo function in @jupyterlab/application

*
 * #### Notes
 * This plugin should only be used by plugins that specifically need to access
 * JupyterLab application information, e.g., listing extensions that have been
 * loaded or deferred within JupyterLab.
 */
const info: JupyterFrontEndPlugin = {
  id: '@jupyterlab/application-extension:info',
  activate: (app: JupyterFrontEnd) => {
    if (!(app instanceof JupyterLab)) {
      throw new Error(`${info.id} must be activated in JupyterLab.`);
    }
    return app.info;
  },
  autoStart: true,
  provides: JupyterLab.IInfo
};

/**
 * The default JupyterLab paths dictionary provider.
 */
const paths: JupyterFrontEndPlugin = {
  id: '@jupyterlab/apputils-extension:paths',
  activate: (app: JupyterFrontEnd): JupyterFrontEnd.IPaths => {
    if (!(app instanceof JupyterLab)) {
      throw new Error(`${paths.id} must be activated in JupyterLab.`);
    }
    return app.paths;
  },
  autoStart: true,
  provides: JupyterFrontEnd.IPaths
};