private static String setInnerMapBuildersFromConfig(InnerCNode innerMap) {
        String entryName = INTERNAL_PREFIX + "entry";
        return "for (Map.Entry<String, " + userDataType(innerMap) + "> " + entryName + " : config." + innerMap.getName()
                + "().entrySet()) {\n" + //
                "  " + innerMap.getName() + "(" + entryName + ".getKey(), new " + userDataType(innerMap) + ".Builder(" + entryName
                + ".getValue()));\n" + //
                "}";
    }
\n" + //
                    " * Make a new builder and run the supplied function on it before using it as the value\n" + //
                    " * @param __func lambda that modifies the given builder\n" + //
                    " * @return this builder\n" + //
                    "
configgen/src/main/java/com/yahoo/config/codegen/BuilderGenerator.java