public static void serialize(InnerNode node, Serializer serializer) {
        serializeMap(node.getChildren(), serializer);
    }
Returns the serialized representation of the given node.
<p>
Declared static, instead of InnerNode member, to avoid a public 0-arg method with a commonly used name.

@param node The inner node
@return a list of strings, containing the serialized representation of this config
config-lib/src/main/java/com/yahoo/config/ConfigInstance.java