return t;
    }

    /**
     * @return
     */
    private synchronized SmbTreeImpl getTreeInternal() {
        final SmbTreeImpl t = this.tree;
        if (t != null) {
            return t;
        }
        if (this.delegate != null) {
            return this.delegate.getTreeInternal();
        }
        return null;
    }

    /**
     * @param t
     */