From 93ff3fbf6e62163bca811f2f93341be6d8c0e47f Mon Sep 17 00:00:00 2001
From: Koichi Shiraishi <zchee.io@gmail.com>
Date: Thu, 24 Feb 2022 14:10:47 +0900
Subject: [PATCH] messageID: add documentation

Signed-off-by: Koichi Shiraishi <zchee.io@gmail.com>
---
 messageID.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/messageID.go b/messageID.go
index 033c4b0a2..689ee80db 100644
--- a/messageID.go
+++ b/messageID.go
@@ -19,6 +19,10 @@ type safeID struct {
 	nextID int64
 }
 
+// make sure safeID implements the IDGenerator interface.
+var _ IDGenerator = (*safeID)(nil)
+
+// Next implements IDGenerator.Next.
 func (s *safeID) Next() int {
 	id := atomic.AddInt64(&s.nextID, 1)