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diff --git a/src/lib/testutils/user_context_utils.h b/src/lib/testutils/user_context_utils.h
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+++ b/src/lib/testutils/user_context_utils.h
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+// Copyright (C) 2017-2020 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef USER_CONTEXT_UTILS_H
+#define USER_CONTEXT_UTILS_H
+
+#include <cc/data.h>
+
+namespace isc {
+namespace test {
+
+/// @brief Move comment entries to user-context
+///
+/// Process an element looking for comment entries in maps and
+/// moving them to user-context entries. As the common case is
+/// no comment and this routine tries to maximize sharing the
+/// standard behavior is just to return the argument unchanged.
+///
+/// @param element
+/// @return a processed copy of element or unmodified element
+isc::data::ElementPtr moveComments(isc::data::ElementPtr element);
+
+/// @brief Move comment entries to user-context (const variant)
+///
+/// @param element
+/// @return a processed copy of element or unmodified element
+isc::data::ConstElementPtr moveComments(isc::data::ConstElementPtr element);
+
+/// extractComments was removed.
+
+}; // end of isc::test namespace
+}; // end of isc namespace
+
+#endif // USER_CONTEXT_UTILS_H