docs: public static Map<String, Object> getInnerLayerConfigFromConfig(Map<String, Object> layerConfig, KerasLayerConfiguration conf)
              throws InvalidKerasConfigurationException {
          if (!layerConfig.containsKey(conf.getLAYER_FIELD_CONFIG()))
              throw new InvalidKerasConfigurationException("Field "
                      + conf.getLAYER_FIELD_CONFIG() + " missing from layer config");
          return (Map<String, Object>) layerConfig.get(conf.getLAYER_FIELD_CONFIG());
      }