public Node addNode(String s) throws ItemExistsException, PathNotFoundException, VersionException, ConstraintViolationException, LockException, RepositoryException {
        return null;
    }
public Node addNode(String s) throws ItemExistsException, PathNotFoundException, VersionException, ConstraintViolationException, LockException, RepositoryException {
        return null;
    }
public node addnode(string s) throws itemexistsexception, pathnotfoundexception, versionexception, constraintviolationexception, lockexception, repositoryexception { return null; }