removeAdvancedListener method
Implementation
void removeAdvancedListener(BarcodeTrackingAdvancedListener listener) {
_advancedListeners.remove(listener);
_checkAndUnsubscribeListeners();
}
void removeAdvancedListener(BarcodeTrackingAdvancedListener listener) {
_advancedListeners.remove(listener);
_checkAndUnsubscribeListeners();
}