code: public void clearReferences() {
  
          if (mAsyncTaskController != null) {
              mAsyncTaskController.detach();
          }
  
          if (mRxTokenController != null) {
              mRxTokenController.detach();
          }
  
          if (mIntentServiceTokenController != null) {
              mIntentServiceTokenController.detach();
          }
  
          mAsyncTaskController = null;
          mRxTokenController = null;
          mIntentServiceTokenController = null;
      }
docs: Clear all the references so that we can start over again.