code: function(options) {
      var stream = through.obj(function(file, enc, cb) {
          var out = options.out;
  
          // Convert to the main file to a vinyl file
          options.out = function(text) {
              cb(null, new gutil.File({
                  path: out,
                  contents: new Buffer(text)
              }));
          };
  
          // Optimize the main file
          requirejs.optimize(options, null, function(err) {
              stream.emit('error', new gutil.PluginError('gulp-rjs', err.message));
          });
      });
  
      return stream;
  }
docs: Optimize gulp task
  @param  {object} options The options object passed to rjs command