@Override
    public int getOrder() {
        return PluginEnum.GRPC.getCode();
    }
plugin is execute.

@param exchange the current server exchange
@return default false.
shenyu-plugin/shenyu-plugin-proxy/shenyu-plugin-rpc/shenyu-plugin-grpc/src/main/java/org/apache/shenyu/plugin/grpc/GrpcPlugin.java