text: @interface Base
  @end
  @interface ImportedClass : Base
  - (nonnull instancetype)init __attribute__((objc_designated_initializer));
  - (nonnull instancetype)initConveniently;
  + (nonnull instancetype)importedClassWithConvenientFactory:(_Bool)unused;
  + (nonnull ImportedClass *)importedClassWithNormalFactory:(_Bool)unused;
  @end
  
  @interface Sub : ImportedClass
  @end
  