@Override
    public void onLoad(ExtensionClass extensionClass) {
        if ("rightxx0".equals(extensionClass.getAlias())) {
            throw new NullPointerException();
        }
    }
@author <a href="mailto:zhanggeng.zg@antfin.com">GengZhang</a>
core/api/src/test/java/com/alipay/sofa/rpc/ext/TestErrorLoadListener.java