code: private void discoverContent(Activity activity) {
          discoveryRepeatCnt_ = 0;
          if (discoveredViewList_.size() < cdManifest_.getMaxViewHistorySize()) { // check if max discovery views reached
              handler_.removeCallbacks(readContentRunnable);
              lastActivityReference_ = new WeakReference<>(activity);
              handler_.postDelayed(readContentRunnable, VIEW_SETTLE_TIME);
          }
      }
docs: ---------------Private methods----------------------//