From 770edec2125540da62d1eabe351408b4014e27c3 Mon Sep 17 00:00:00 2001
From: Andrew Straw <strawman@astraw.com>
Date: Thu, 6 Oct 2022 14:34:38 +0200
Subject: [PATCH] add clarifying comment

---
 src/tz_macos.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tz_macos.rs b/src/tz_macos.rs
index 897a934..308634c 100644
--- a/src/tz_macos.rs
+++ b/src/tz_macos.rs
@@ -80,6 +80,9 @@ mod string_ref {
 
     pub(crate) struct StringRef<'a, T> {
         string: CFStringRef,
+        // We exclude mutable access to the parent by taking a reference to the
+        // parent (rather than, for example, just using a marker to enforce the
+        // parent's lifetime).
         _parent: &'a T,
     }