docs: private void prepareBuffers(List<DBBPool.BBContainer> buffers)
      {
          Preconditions.checkArgument(buffers.size() == m_tableTasks.size());
  
          UnmodifiableIterator<SnapshotTableTask> iterator = m_tableTasks.iterator();
          for (DBBPool.BBContainer container : buffers) {
              int headerSize = iterator.next().m_target.getHeaderSize();
              final ByteBuffer buf = container.b();
              buf.clear();
              buf.position(headerSize);
          }
      }