anchor.diff:  * `StompSubProtocolErrorHandler` extension point to customize and control STOMP ERROR frames to clients.
   * Global `@MessageExceptionHandler` methods via `@ControllerAdvice` components.
   * Heart-beats and a SpEL expression 'selector' header for subscriptions with `SimpleBrokerMessageHandler`.
  -* STOMP client for use over TCP and WebSocket, see <<websocket-stomp-client>>.
  +* STOMP client for use over TCP and WebSocket; see <<websocket-stomp-client>>.
   * `@SendTo` and `@SendToUser` can contain destination variable placeholders.
   * Jackson's `@JsonView` supported for return values on `@MessageMapping` and `@SubscribeMapping` methods.
   * `ListenableFuture` and `CompletableFuture` as return value types from
     `@MessageMapping` and `@SubscribeMapping` methods.
   * `MarshallingMessageConverter` for XML payloads.
  -
  -=== Core Container Improvements
  -
  -* The application event infrastructure now offers an <<context-functionality-events-annotation,
  -  annotation-based model>> as well as the ability to publish any arbitrary event.
  -** Any managed bean public method can be annotated with `@EventListener` to consume events
  -** `@TransactionalEventListener` provides transaction-bound event support
  -* The features of field-based data binding (`DirectFieldAccessor`) has been aligned to the current
  -  property-based data binding (`BeanWrapper`). In particular, field-based binding now supports
  -  navigation for Collections, Arrays and Maps.
  -* `DefaultConversionService` now provides extra out-of-the-box converters for `Stream`, `Charset`,
  -  `Currency` and `TimeZone`. Such converters can be added individually to any arbitrary
  -  `ConversionService` as well.
  -* `SimpleJdbcCallOperations` now supports named binding.
  -* `JavaMailSender` has a connectivity check method.
  -* `ScheduledTaskRegistrar` exposes scheduled tasks.
  -* Support for Apache `commons-pool2`.
  -* `javax.transaction.Transactional` support in AspectJ.
  -
  -=== JMS Improvements
  -
  -* The `autoStartup` attribute can be controlled via `JmsListenerContainerFactory`.
  -* The type of the reply `Destination` can now be configured per listener container.
  -* The value of the `@SendTo` annotation can now use an expression.
  
positive.code:   on`@RequestBody` method arguments.
  * `HandlerMethod` as a method argument on `@ExceptionHandler` methods, especially
    handy in `@ControllerAdvice` components.
  * `java.util.concurrent.CompletableFuture` as an @Controller method return value type.
  * Byte-range request support in `HttpHeaders` and for serving static resource.
  * `@ResponseStatus` detected on nested exceptions.
  * `UriTemplateHandler` extension point in the RestTemplate.
  ** `DefaultUriTemplateHandler` exposes "baseUrl" property and path segment encoding options.
  ** the extension point can also be used to plug any URI template library.
  * http://square.github.io/okhttp/[OkHTTP] integration with the RestTemplate.
  * Custom "baseUrl" alternative for methods in MvcUriComponentsBuilder.
  
  
  === WebSocket Messaging Improvements
  
  
negative.code: [[new-in-4.2]]
  == New Features and Enhancements in Spring Framework 4.2
  
  === Core Container Improvements
  
  * The application event infrastructure now offers an <<context-functionality-events-annotation,
    annotation-based model>> as well as the ability to publish any arbitrary event.
  ** Any managed bean public method can be annotated with `@EventListener` to consume events.
  ** `@TransactionalEventListener` provides transaction-bound event support.
  * The features of field-based data binding (`DirectFieldAccessor`) have been aligned to the current
    property-based data binding (`BeanWrapper`). In particular, field-based binding now supports
    navigation for Collections, Arrays, and Maps.
  * `DefaultConversionService` now provides extra out-of-the-box converters for `Stream`, `Charset`,
    `Currency`, and `TimeZone`. Such converters can be added individually to any arbitrary
    `ConversionService` as well.
  * `SimpleJdbcCallOperations` now supports named binding.
  * `JavaMailSender` has a connectivity check method.
  * `ScheduledTaskRegistrar` exposes scheduled tasks.
  * Support for Apache `commons-pool2`
  * `javax.transaction.Transactional` support in AspectJ
  
  === JMS Improvements
  
  * The `autoStartup` attribute can be controlled via `JmsListenerContainerFactory`.
  * The type of the reply `Destination` can now be configured per listener container.
  * The value of the `@SendTo` annotation can now use a SpEL expression.
  
  === Web Improvements
  
  