code: function nextend(target) { var sources
          sources = __slice.call(arguments, 1)
          sources.forEach(function(source) {
              keys(source).forEach(function(key) {
                  target[key] = source[key] })})
  
          return target
      }
docs: /// Function nextend /////////////////////////////////////////////////////  (target:Obj, sources...:Obj) ↦ Obj  Extends an object with properties from multiple sources.