docs: public Object getPhysicalData()
      {
          if (m_baOut == null)
          {
              if (m_baIn == null)
                  return null;
              m_baIn.reset();
              int iLen = m_baIn.available();
              byte[] rgby = new byte[iLen];
              m_baIn.read(rgby, 0, iLen);
              return rgby;
          }
          return m_baOut.toByteArray();
      }