From 2d9b4fedc9367f2caa8858809a45ba26ec6a9fc7 Mon Sep 17 00:00:00 2001
From: "zhenshan.cao" <zhenshan.cao@zilliz.com>
Date: Fri, 24 Sep 2021 21:37:57 +0800
Subject: [PATCH] [skip ci] Add comments for flow_graph_message.go (#8523)

Signed-off-by: zhenshan.cao <zhenshan.cao@zilliz.com>
---
 internal/querynode/flow_graph_message.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/querynode/flow_graph_message.go b/internal/querynode/flow_graph_message.go
index d43a04e3ae..e56fa87a7a 100644
--- a/internal/querynode/flow_graph_message.go
+++ b/internal/querynode/flow_graph_message.go
@@ -16,7 +16,10 @@ import (
 	"github.com/milvus-io/milvus/internal/util/flowgraph"
 )
 
+// Msg is an interface which has a function named TimeTick
 type Msg = flowgraph.Msg
+
+// MsgStreamMsg is an implementation of interface Msg
 type MsgStreamMsg = flowgraph.MsgStreamMsg
 
 type insertMsg struct {