code: public static <T> C10NFilterProvider<T> staticFilterProvider(C10NFilter<T> filter) {
          Preconditions.assertNotNull(filter, "filter");
          return new StaticC10NFilterProvider<T>(filter);
      }
docs: <p>Filter provider that always returns the specified instance
  
  @param filter filter instance to return from the generated provider(not-null)
  @param <T>    Filter argument type
  @return instance of filter provider (never-null)