Reference syntax for topic tree binding to a fixed template

pivot_binding.js

        var albumBinder =
            pivot("album", ".album",
                pivot("*", ".song",
                    pivot("verses/*", ".verse",
                        pivot("*", ".line", function(topic, control){
                            return screenplay.bindLeaf(tree, topic, control);
                        })
                    )
                )
            );

        albumBinder(getRootTopic(), albumTemplate);