org.checkerframework.checker.fenum.qual

Annotation Type SwingSplitPaneOrientation

@Documented
 @Retention(value=RUNTIME)
 @Target(value={TYPE_USE,TYPE_PARAMETER})
 @SubtypeOf(value=FenumTop.class)
public @interface SwingSplitPaneOrientation

See the Checker Framework Manual:

Fake Enum Checker