@Documented @Retention(value=RUNTIME) @Target(value={TYPE_USE,TYPE_PARAMETER}) @PolymorphicQualifier(value=UnknownRegex.class) public @interface PolyRegex
Any method written using PolyRegex conceptually has two versions: one in which every
instance of PolyRegex has been replaced by Regex, and one in which every instance
of PolyRegex has been replaced by UnknownRegex.