<WRAP todo>
This method is undocumented, and the actual code does not explain it's use. Can you help with documenting it?
</WRAP>
====== ADOdb_Session::filter======
~~NOTOC~~
<WRAP right box>
==Syntax==
  string ADOdb_Session::filter(
    optional string $filterName
    )
</WRAP>
===== Description =======
The **static** method //**filter**// is associated with using simultaneous levels on encryption/compression, but it's actual utility is unknown