code: @Nullable
  	public byte[] getServiceData(@NonNull final ParcelUuid serviceDataUuid) {
  		//noinspection ConstantConditions
  		if (serviceDataUuid == null || serviceData == null) {
  			return null;
  		}
  		return serviceData.get(serviceDataUuid);
  	}
docs: Returns the service data byte array associated with the {@code serviceUuid}. Returns
  {@code null} if the {@code serviceDataUuid} is not found.