From 26e462da954036c11d253c0ca231844075a82515 Mon Sep 17 00:00:00 2001
From: cheme <emericchevalier.pro@gmail.com>
Date: Wed, 24 Jan 2024 15:08:14 +0100
Subject: [PATCH] restore empty function, call it unchanged

---
 trie-db/src/triedbmut.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/trie-db/src/triedbmut.rs b/trie-db/src/triedbmut.rs
index 0e34eb8f..f3bb3b5c 100644
--- a/trie-db/src/triedbmut.rs
+++ b/trie-db/src/triedbmut.rs
@@ -837,6 +837,14 @@ impl<H: Copy, DL: Default> Changeset<H, DL> {
 			Changeset::Existing(node) => node.hash,
 		}
 	}
+
+	pub fn unchanged(root: H) -> Self {
+		Changeset::Existing(ExistingChangesetNode {
+			hash: root,
+			prefix: (BackingByteVec::new(), None),
+			location: Default::default(),
+		})
+	}
 }
 
 pub type OwnedPrefix = (BackingByteVec, Option<u8>);