From d2381556401723e0cd87b6292dde34a0a4f46f29 Mon Sep 17 00:00:00 2001
From: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Date: Thu, 20 Jul 2023 12:37:42 +1200
Subject: [PATCH] Add size getter to CallbackManager (#5129)

---
 esphome/core/helpers.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/esphome/core/helpers.h b/esphome/core/helpers.h
index 05a7eaa4cc..63b6949fe9 100644
--- a/esphome/core/helpers.h
+++ b/esphome/core/helpers.h
@@ -475,6 +475,7 @@ template<typename... Ts> class CallbackManager<void(Ts...)> {
     for (auto &cb : this->callbacks_)
       cb(args...);
   }
+  size_t size() const { return this->callbacks_.size(); }
 
   /// Call all callbacks in this manager.
   void operator()(Ts... args) { call(args...); }