code: function mixIn(target, objects){
          var i = 0,
              n = arguments.length,
              obj;
          while(++i < n){
              obj = arguments[i];
              if (obj != null) {
                  forOwn(obj, copyProp, target);
              }
          }
          return target;
      }
docs: Combine properties from all the objects into first one.
  - This method affects target object in place, if you want to create a new Object pass an empty object as first param.
  @param {object} target    Target Object
  @param {...object} objects    Objects to be combined (0...n objects).
  @return {object} Target Object.