message "Hello world!"
// wombats = FileCollection("wombats")
// wombats.print()
// hairies = Selector(name("hairy")) 
// wombats.apply(hairies)
// the following not yet implemented
// wombats.apply(Selector(name("")))
// wombats.print()
// marsupials = FileCollection("marsupials")
// marsupials.print()