code: private static double getBiasL2RegularizationFromConfig(Map<String, Object> layerConfig,
                                                              boolean enforceTrainingConfig,
                                                              KerasLayerConfiguration conf)
              throws UnsupportedKerasConfigurationException, InvalidKerasConfigurationException {
          Map<String, Object> innerConfig = KerasLayerUtils.getInnerLayerConfigFromConfig(layerConfig, conf);
          if (innerConfig.containsKey(conf.getLAYER_FIELD_B_REGULARIZER())) {
              Map<String, Object> regularizerConfig =
                      (Map<String, Object>) innerConfig.get(conf.getLAYER_FIELD_B_REGULARIZER());
              if (regularizerConfig != null && regularizerConfig.containsKey(conf.getREGULARIZATION_TYPE_L2()))
                  throw new UnsupportedKerasConfigurationException("L2 regularization for bias parameter not supported");
          }
          return 0.0;
      }
docs: Get L2 bias regularization (if any) from Keras bias regularization configuration.
  
  @param layerConfig dictionary containing Keras layer configuration
  @return L1 regularization strength (0.0 if none)