text: import crypto from 'crypto';
  import document from 'document';
  import fs from 'fs';
  import jpeg from 'jpeg';
  import power from 'power';
  import scientific from 'scientific';
  import signal from 'scientific/signal';
  import system from 'system';
  import userActivity from 'user-activity';
  import userSettings from 'user-settings';
  
  console.log('typeof crypto: ' + typeof crypto);
  console.log('typeof document: ' + typeof document);
  console.log('typeof fs: ' + typeof fs);
  console.log('typeof jpeg: ' + typeof jpeg);
  console.log('typeof power: ' + typeof power);
  console.log('typeof scientific: ' + typeof scientific);
  console.log('typeof signal: ' + typeof signal);
  console.log('typeof system: ' + typeof system);
  console.log('typeof userActivity: ' + typeof userActivity);
  console.log('typeof userSettings: ' + typeof userSettings);
  