The common interface extended by all annotation types. Note that an
interface that manually extends this one does not define
an annotation type. Also note that this interface does not itself
define an annotation type.
More information about annotation types can be found in section 9.6 of
The Java™ Language Specification.
The java.lang.reflect.AnnotatedElement interface discusses
compatibility concerns when evolving an annotation type from being
non-repeatable to being repeatable.