--- /dev/null
+/*
+ * Copyright (c) 2020 PANTHEON.tech, s.r.o. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.mdsal.yanglib.api;
+
+import com.google.common.annotations.Beta;
+import java.util.Optional;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
+
+@Beta
+public interface YangLibraryContentBuilderWithLegacy extends YangLibraryContentBuilder {
+ /**
+ * Format legacy content, if applicable. It is guaranteed to be a sibling of the main content returned by
+ * {@link #formatYangLibraryContent()}.
+ *
+ * @return Legacy content, if applicable.
+ */
+ Optional<ContainerNode> formatYangLibraryLegacyContent();
+}