From c7b5d694319973c37dcaca4e21a2d89530de3fba Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Thu, 15 Jul 2021 19:50:43 -0400
Subject: [PATCH] Add extra usage hint.

---
 Activity/Observer.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Activity/Observer.hpp b/Activity/Observer.hpp
index bcc3071fa..2357fb164 100644
--- a/Activity/Observer.hpp
+++ b/Activity/Observer.hpp
@@ -27,6 +27,8 @@ class Observer {
 		virtual void register_led([[maybe_unused]] const std::string &name) {}
 
 		/// Announces to the receiver that there is a drive of name @c name.
+		///
+		/// If a drive has the same name as an LED, that LED goes with this drive.
 		virtual void register_drive([[maybe_unused]] const std::string &name) {}
 
 		/// Informs the receiver of the new state of the LED with name @c name.