test/Modules/Inputs/category_bottom.h - clang - Git at Google

 @import category_left;

 @interface Foo(Bottom)
 -(void)bottom;
 @end

 @import category_right;

 @interface LeftFoo(Bottom)
 -(void)bottom;
 @end
	@import category_left;

	@interface Foo(Bottom)
	-(void)bottom;
	@end

	@import category_right;

	@interface LeftFoo(Bottom)
	-(void)bottom;
	@end