Uses of AnnotationMetadata#getAnnotationAttributes throughout the
framework have been updated to use the new AnnotationAttributes API in
order to take advantage of the more concise, expressive and type-safe
methods there.
All changes are binary compatible to the 3.1.0 public API, save
the exception below.
A minor binary compatibility issue has been introduced in
AbstractCachingConfiguration, AbstractAsyncConfiguration and
AbstractTransactionManagementConfiguration when updating their
protected Map<String, Object> fields representing annotation attributes
to use the new AnnotationAttributes API. This is a negligible breakage,
however, as the likelilhood of users subclassing these types is very
low, the classes have only been in existence for a short time (further
reducing the likelihood), and it is a source-compatible change given
that AnnotationAttributes is assignable to Map<String, Object>.
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