def init_ou_structure(self):
        # Change from original: Drop OUs outside self.root_ou_id subtree.
        super(RandsoneOrgLdif, self).init_ou_structure()
        ous, tree = [self.root_ou_id], self.ou_tree
        for ou in ous:
            ous.extend(tree.get(ou, ()))
        self.ou_tree = dict((ou, tree[ou]) for ou in ous if ou in tree)