docs: public static void unregisterProgressListener(@NonNull final Context context, @NonNull final DfuProgressListener listener) {
  		if (mProgressBroadcastReceiver != null) {
  			final boolean empty = mProgressBroadcastReceiver.removeProgressListener(listener);
  
  			if (empty) {
  				LocalBroadcastManager.getInstance(context).unregisterReceiver(mProgressBroadcastReceiver);
  				mProgressBroadcastReceiver = null;
  			}
  		}
  	}