@Override
    public int getOrder() {
        return PluginEnum.DUBBO.getCode();
    }
return plugin order .
This attribute To determine the plugin execution order in the same type plugin.

@return int order
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-dubbo/shenyu-plugin-dubbo-common/src/main/java/org/apache/shenyu/plugin/dubbo/common/AbstractDubboPlugin.java