text: /**
   * Example for using LWIP to shift image's hue by 50 degrees.
   */
  
  const lwip = require('../');
  
  lwip.open('lena.jpg', (err, image) => {
      if (err) return console.log(err);
      image.writeFile('lena_progressive.jpg', 'jpg', { progressive: true },
          err => {
              if (err) return console.log(err);
              console.log('done');
          });
  });
  