private static boolean rankProfileBuiltinIdentifier(String identifier) {
        return identifier.equals("default") || identifier.equals("unranked");
    }
Assuming first parsing step is done, use the list of unresolved inheritance
declarations to register the inheritance at index.
@return List of diagnostic found during inheritance handling
integration/schema-language-server/language-server/src/main/java/ai/vespa/schemals/schemadocument/resolvers/InheritanceResolver.java