require("overload").Watchable(
   function(argInfo){
       return typeof(argInfo.property)=='number'
       ? proxiedObj.item(argInfo.property)
       : proxiedObj[argInfo.property];
   }
   ,function(argInfo){return proxiedObj[argInfo.property]=argInfo.value}
   ,function(){return Object.getPropertyNames(proxiedObj)}
   ,function(argInfo){return argInfo.property in proxiedObj}
   ,function(argInfo){proxiedObj[delete argInfo.property]}
)