Update README.md

README.md

@@ -1195,7 +1195,7 @@ alias | Set a name to the object to identify it at some circumstances | String
 Property | Description | Type
 ------------ | ------------- | -------------
 data | Insert data directly to the object | Object
-config.url | Specify a URL to use when performing data synchronization | String
+config.url | Specify a URL to use when performing data synchronization, this parameter can also be a function that returns the value for the URL | String
 config.forceParamId | Include the record ID inside data payload when sending it to the server | Boolean
 config.sendJSON | Force data to be sent as a JSON string | Boolean
 config.ajaxConf | Receives an object with jQuer.ajax() extra settings | Object