I think the configuration should be passed to the parent constructor, so that it is possible to use the parent configuration properties.
In that case, it is no longer needed to check the configuration in this class (as this is achieved in the parent class). So the constructor could look like this:

```js
        $constructor : function (cfg) {
            this.$LCResourcesHandler.constructor.call(this, cfg);
            if (cfg && this._cfgOk) {
                this.allowRangeValues = !!cfg.allowRangeValues;
            }
        },
```

This supposes that the parent constructor is changed to do `this._cfgOk = true` in case the validation of the config with the bean is ok.