From 0a428f0887c93f44545ec280778b295e7aa577c8 Mon Sep 17 00:00:00 2001
From: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
Date: Fri, 29 Mar 2024 15:58:22 +0100
Subject: [PATCH] Improve docs of `ui.collapsing`

See https://github.com/emilk/egui/issues/4265
---
 crates/egui/src/ui.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/crates/egui/src/ui.rs b/crates/egui/src/ui.rs
index 56db9e97..9ff05a26 100644
--- a/crates/egui/src/ui.rs
+++ b/crates/egui/src/ui.rs
@@ -1806,6 +1806,9 @@ impl Ui {
     }
 
     /// A [`CollapsingHeader`] that starts out collapsed.
+    ///
+    /// The name must be unique within the current parent,
+    /// or you need to use [`CollapsingHeader::id_source`].
     pub fn collapsing<R>(
         &mut self,
         heading: impl Into<WidgetText>,