[Zope-Checkins] CVS: Zope2 - Length.py:1.1.2.2

[Jim Fulton]

Update of /cvs-repository/Zope2/lib/python/BTrees
In directory korak:/tmp/cvs-serv28283

Modified Files:
      Tag: Catalog-BTrees-Integration
	Length.py 
Log Message:
Added a new protocol, _p_independent.

If an object defines this method, and the method returns a true value,
then the objects state can be loaded even if the object's value was
invalidated by another transaction.

This method basically says that the object's state doesn't effect and
is not affected by the state of other objects.