docs: public Object getPropertyValue(String pKey, Object pDefaultValue) {
  
      Object value = super.get(pKey);  // super.get() is EXTREMELEY IMPORTANT
  
      if (value != null) {
        return value;
      }
      if (defaults instanceof XMLProperties) {
        return (((XMLProperties) defaults).getPropertyValue(pKey));
      }
      return ((defaults != null) ? defaults.getProperty(pKey) : pDefaultValue);
    }