'If the given object has support for the C{postUnjelly} hook, set it up
to be called at the end of deserialization.
@param unjellied: an object that has already been unjellied.
@return: C{unjellied}'

def _maybePostUnjelly(self, unjellied):

    if hasattr(unjellied, 'postUnjelly'):
        self.postCallbacks.append(unjellied.postUnjelly)
    return unjellied
