deba [Wed, 01 Mar 2006 10:17:25 +0000] rev 1990
Some classes assumed that the GraphMaps should be inherited
from an ObserverBase. These classes parents replaced with
DefaultMap which cause that the graph maps should not be
inherited from the ObserverBase.
deba [Wed, 01 Mar 2006 10:04:47 +0000] rev 1989
Traits for alteration notifiers
SplitGraph is temporarly deleted