docs: public <T> EasyRandomParameters randomize(Predicate<Field> predicate, Randomizer<T> randomizer) {
          Objects.requireNonNull(predicate, "Predicate must not be null");
          Objects.requireNonNull(randomizer, "Randomizer must not be null");
          customRandomizerRegistry.registerRandomizer(predicate, randomizer);
          return this;
      }