From de5f63eeb398046027180162272cc83099fdef55 Mon Sep 17 00:00:00 2001
From: Richard Kimberly Heck <rikiheck@lyx.org>
Date: Sun, 19 May 2024 16:55:48 -0400
Subject: [PATCH] Return a reference, not a copy.

Stupid mistake from 2009. Thanks to Scott and JMarc for tracking
it down.
---
 src/insets/InsetLayout.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/insets/InsetLayout.h b/src/insets/InsetLayout.h
index 36a3c91bbf..0848adef45 100644
--- a/src/insets/InsetLayout.h
+++ b/src/insets/InsetLayout.h
@@ -200,7 +200,7 @@ public:
 	///
 	bool docbookrenderasimage() const { return docbookrenderasimage_; }
 	///
-	std::set<std::string> required() const { return required_; }
+	std::set<std::string> required() const & { return required_; }
 	///
 	bool isMultiPar() const { return multipar_; }
 	///