code: @Override
  	public ZooPC readObject(long oid) {
  	    final DataDeSerializer dds = ddsPool.get();
  		final ZooPC pci = readObject(dds, oid);
  		ddsPool.offer(dds);
  		return pci;
  	}
docs: Locate an object.
  @param oid Object ID
  @return Path name of the object (later: position of obj)