'Receive an instance when it\'s constructor is called.
This method is only called during a userland construction of
an object.  It is not called when an object is loaded from the
database.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper\'s behavior isn\'t modified by this method.'

def init_instance(self, mapper, class_, oldinit, instance, args, kwargs):

    return EXT_CONTINUE
