def save
      parent.with_open_session do |session|
        machine = session.machine
        save_changed_interface_attributes(machine.get_storage_controller_by_name(name))
      end
    end
def save
      parent.with_open_session do |session|
        machine = session.machine
        save_changed_interface_attributes(machine.get_storage_controller_by_name(name))
      end
    end
Saves the storage controller. This method shouldn't be called directly.
 Instead, {VM#save} should be called, which will save all attached storage
 controllers as well. This will setup the proper parameter for `interface`
 here.