addAdvancedListener method

void addAdvancedListener(
  1. BarcodeTrackingAdvancedListener listener
)

Implementation

void addAdvancedListener(BarcodeTrackingAdvancedListener listener) {
  _checkAndSubscribeListeners();

  if (_advancedListeners.contains(listener)) {
    return;
  }
  _advancedListeners.add(listener);
}