code: public Properties<JobXMLDescriptor> getOrCreateProperties()
     {
        Node node = model.getOrCreate("properties");
        Properties<JobXMLDescriptor> properties = new PropertiesImpl<JobXMLDescriptor>(this, "properties", model, node);
        return properties;
     }
docs: If not already created, a new <code>properties</code> element with the given value will be created.
  Otherwise, the existing <code>properties</code> element will be returned.
  @return  a new or existing instance of <code>Properties<JobXMLDescriptor></code>