```ares.setupTraceLogger(context)``` is used to declare the tracing mecanism of Ares and it is already done in the 'create' method of the related kind (and has to be declared only in this method).
If your goal was to trace the content of 'this.config' at this moment, please use ```this.trace(this.config);```. In case not, you can just remove this line, it has no effect.