@Nullable
    public byte[] getServiceData(ParcelUuid serviceDataUuid) {
        if (serviceDataUuid == null) {
            return null;
        }
        return serviceData.get(serviceDataUuid);
    }
Returns the service data byte array associated with the {@code serviceUuid}. Returns
{@code null} if the {@code serviceDataUuid} is not found.
rxandroidble/src/main/java/com/polidea/rxandroidble2/internal/scan/ScanRecordImplCompat.java