test/APINotes/Inputs/Frameworks/SomeKit.framework/Headers/SomeKitExplicitNullability.h

@interface A(ExplicitNullabilityProperties)
@property (nonatomic, readwrite, retain, nonnull) A *explicitNonnullInstance;
@property (nonatomic, readwrite, retain, nullable) A *explicitNullableInstance;
@end