docs: public byte[] nextDependencyAsBytes(final int dependencyId) {
          final VoltTable vt =  m_dependencyTracker.nextDependency(dependencyId);
          if (vt != null) {
              final ByteBuffer buf2 = PrivateVoltTableFactory.getTableDataReference(vt);
              int pos = buf2.position();
              byte[] bytes = new byte[buf2.limit() - pos];
              buf2.get(bytes);
              buf2.position(pos);
              return bytes;
          }
          else {
              return null;
          }
      }