The Distributed Object class is the base class for all network based
(i.e. distributed) objects. These will usually (always?) have a
dclass entry in a *.dc file.
A new child has just setLocation beneath us. Give us a
chance to run code when a new child sets location to us. For
example, we may want to scene graph reparent the child to
some subnode we own.
A child has just changed zones beneath us with setLocation.
Give us a chance to run code when an existing child sets
location to us. For example, we may want to scene graph
reparent the child to some subnode we own.