code: function(target) {
  
          for (var i$2 = 1; i$2 < arguments.length; i$2 += 3) {
  
              var desc$0 = Object.getOwnPropertyDescriptor(arguments[i$2 + 1], "_");
              mergeProperty(target, arguments[i$2], desc$0, true);
  
              if (i$2 + 2 < arguments.length)
                  mergeProperties(target, arguments[i$2 + 2], true);
          }
  
          return target;
      }
docs: Support for computed property names