Spring Match additionally against exception causes in RetryPolicy.Builder and @Retryable

Spring Framework 7.0.0-M9

Spring Retry's RetryTemplateBuilder has a traversingCauses() option, allowing setups like this:

new RetryTemplateBuilder()
 .retryOn(IOException.class)
 .traversingCauses()
 .build();

This is handy for scenarios where I don't really care about the top-level exception being thrown, but I want to retry if the underlying cause is an IOException, for example.

The new support in Framework doesn't really have an equivalent here. While I can supply my own exception predicate to the RetryPolicy and check the root cause myself, I wouldn't be able to use the convenient includes() and excludes() configurations for that. Please consider adding that feature, allowing me to do something like this:

new RetryTemplate(RetryPolicy.builder()
  .includes(Foo.class)
  .excludes(Bar.class)
  .traversingCauses()
  .build());

The annotation-based equivalent would be @Retryable(includes = Foo.class, excludes = Bar.class, traversingCauses = true).