**** Executes a series of (user defined) operations when the `Registry` starts up. Operations are ** defined by contributing listeners to the 'RegistryStartup' service. For example, add the ** following to your module:** ** @Contribute** static Void contributeRegistryStartup(OrderedConfig config, MyService myService) {** config.addUnordered |->| {** myService.startup()** }** }** ** @uses OrderedConfig of |->|constmixin RegistryStartup {}