- private static List<Class<? extends TestingThreadPoolServiceInterface>> ifc = Arrays
- .asList(ModifiableThreadPoolServiceInterface.class, TestingThreadPoolServiceInterface.class);
+
+ private static Set<Class<? extends AbstractServiceInterface>> ifc = Collections.unmodifiableSet(Sets.newHashSet(
+ (Class<? extends AbstractServiceInterface>) ModifiableThreadPoolServiceInterface.class,
+ TestingThreadPoolServiceInterface.class));