code: public V call() throws Exception {
          if (Tracy.isEnabled(this.tracyWorkerContext))   {
              Tracy.setContext(this.tracyWorkerContext);
          }
          else    {
              Tracy.clearContext();
          }
          return userCallable.call();
      }
docs: When called from the worker thread, will inject the worker TracyThreadContext
  created in the constructor <br>
  NOTE: super.call() must called as the first line of the the TracyCallable derived class
  call() method