From 5d67365cc93971f551346167da4f02074d70fdf2 Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Mon, 27 Apr 2020 07:33:23 -0700
Subject: [PATCH] logtail: add PrivateID.IsZero method

---
 logtail/id.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/logtail/id.go b/logtail/id.go
index 2c0b72517..62762f78a 100644
--- a/logtail/id.go
+++ b/logtail/id.go
@@ -55,6 +55,9 @@ func ParsePrivateID(s string) (PrivateID, error) {
 	return p, nil
 }
 
+// IsZero reports whether id is the zero value.
+func (id PrivateID) IsZero() bool { return id == PrivateID{} }
+
 func (id *PrivateID) UnmarshalText(s []byte) error {
 	b, err := hex.DecodeString(string(s))
 	if err != nil {