@Override
    public int getOrder() {
        return PluginEnum.GENERAL_CONTEXT.getCode();
    }
GeneralContextPlugin, transfer http headers to rpc context.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-general-context/src/main/java/org/apache/shenyu/plugin/general/context/GeneralContextPlugin.java