docs: public byte[] getServiceData()
      {
          if (tc.isEntryEnabled())
              Tr.entry(tc, "getServiceData", this);
  
          byte[] serviceData = null;
  
          if (_logFileHeader != null)
          {
              serviceData = _logFileHeader.getServiceData();
          }
  
          if (tc.isEntryEnabled())
              Tr.exit(tc, "getServiceData", RLSUtils.toHexString(serviceData, RLSUtils.MAX_DISPLAY_BYTES));
          return serviceData;
      }