Integrating github/staging through commit ab87ed9

Code/Framework/AzToolsFramework/AzToolsFramework/Prefab/PrefabUndoHelpers.h

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+/*
+ * All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+ * its licensors.
+ *
+ * For complete copyright and license terms please see the LICENSE at the root of this
+ * distribution (the "License"). All use of this software is governed by the License,
+ * or, if provided, by the license below or the license accompanying this file. Do not
+ * remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ */
+
+#pragma once
+
+namespace AzToolsFramework
+{
+    namespace Prefab
+    {
+        namespace PrefabUndoHelpers
+        {
+            void UpdatePrefabInstance(
+                const Instance& instance, AZStd::string_view undoMessage, const PrefabDom& instanceDomBeforeUpdate,
+                UndoSystem::URSequencePoint* undoBatch);
+        }
+    } // namespace Prefab
+} // namespace AzToolsFramework