from preamble:

"Change Set:		invarAssn-raok
Date:			29 August 2002
Author:			Richard A. O'Keefe

Adds InvariantKeyAssociation, a
subclass of Association which can be
safely used when the key must not be
replaced."!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: invarAssn-raok.cs.gz
Type: application/octet-stream
Size: 556 bytes
Desc: not available
Url : http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20020829/8ba49c80/invarAssn-raok.cs.obj