@Override
    public void unregister(Node node) {
        if (node == null) {
            throw new IllegalArgumentException("unregister node == null");
        }
        if (LOGGER.isInfoEnabled()) {
            LOGGER.info("Unregister: " + node);
        }
        registered.remove(node);
    }
@author Robert HG (254963746@qq.com) on 5/17/15.
lts-core/src/main/java/com/github/ltsopensource/core/registry/AbstractRegistry.java