code: public EasyRandomParameters randomizerRegistry(final RandomizerRegistry registry) {
          Objects.requireNonNull(registry, "Registry must not be null");
          userRegistries.add(registry);
          return this;
      }
docs: Register a {@link RandomizerRegistry}.
  
  @param registry the {@link RandomizerRegistry} to register
  @return the current {@link EasyRandomParameters} instance for method chaining