@Override
    public void fillInToString(StringBuilder sb) {
      super.fillInToString(sb);
    }
Used to process an incoming connection controller profile. Any controller or cache server in
this vm needs to be told about this incoming new controller. The reply needs to contain any
controller(s) that exist in this vm and any cache servers that exist in this vm.

@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/cache/ControllerAdvisor.java