test/Interpreter/Inputs/objc_runtime_visible.m - third_party/swift - Git at Google

 #import "objc_runtime_visible.h"

 @implementation HiddenClass
 - (NSString *)name {
   return @"Beatrice";
 }
 @end

 HiddenClass *createHidden() {
   return [[HiddenClass alloc] init];
 }
	#import "objc_runtime_visible.h"

	@implementation HiddenClass
	- (NSString *)name {
	return @"Beatrice";
	}
	@end

	HiddenClass *createHidden() {
	return [[HiddenClass alloc] init];
	}