code: public static NormalizerSerializer getDefault() {
          if (defaultSerializer == null) {
              defaultSerializer = new NormalizerSerializer().addStrategy(new StandardizeSerializerStrategy())
                      .addStrategy(new MinMaxSerializerStrategy())
                      .addStrategy(new MultiStandardizeSerializerStrategy())
                      .addStrategy(new MultiMinMaxSerializerStrategy())
                      .addStrategy(new ImagePreProcessingSerializerStrategy())
                      .addStrategy(new MultiHybridSerializerStrategy());
          }
          return defaultSerializer;
      }
docs: Get the default serializer configured with strategies for the built-in normalizer implementations
  
  @return the default serializer