docs: public boolean showElement(String key, String defaultValue, Properties displayOptions) {
  
          if (defaultValue == null) {
              return ((displayOptions != null) && Boolean.valueOf(displayOptions.getProperty(key)).booleanValue());
          }
          if (displayOptions == null) {
              return Boolean.valueOf(defaultValue).booleanValue();
          }
          return Boolean.valueOf(displayOptions.getProperty(key, defaultValue)).booleanValue();
      }