Scratch pad for changes destined for the 5.8.3 release notes page.

Added methods

• add(URL url, String memo) to URLChangeTracker
• getChangeResourcesMemos() to URLChangeTracker
• getValues() to MultiKey
• New getLogicalName() method in ComponentClassResolver.
• New getPlasticManager() method in PlasticProxyFactory
• New getPageNames() method in BeanBlockOverrideSource

Non-backward-compatible changes (but that probably won't cause problems)

• New addInvalidationCallback(Function<List, List> callback) method in InvalidationEventHub
• New getEmbeddedElementIds() method in ComponentPageElement (internal service)
• New registerClassName() method in ResourceChangeTracker (internal service)
• New clearClassName() method in ResourceChangeTracker (internal service)

Overall notes

• Before