docs: def property_absent(name, property):
      '''
      Ensure property is absent
  
      name : string
          name of the zone
      property : string
          name of property
  
      .. note::
          This does a zoneacfg clear call. So the property may be reset to a default value!
          Does has the side effect of always having to be called.
  
      '''
      ret = {'name': name,
             'changes': {},
             'result': None,
             'comment': ''}
  
      zones = __salt__['zoneadm.list'](installed=True, configured=True)
      if name in zones:
          ## zone exists
          zonecfg = __salt__['zonecfg.info'](name, show_all=True)
          if property in zonecfg:
              if __opts__['test']:
                  ret['result'] = True
              else:
                  # clear property
                  zonecfg_res = __salt__['zonecfg.clear_property'](name, property)
                  zonecfg_new = __salt__['zonecfg.info'](name, show_all=True)
                  ret['result'] = zonecfg_res['status']
                  if 'messages' in zonecfg_res:
                      ret['comment'] = zonecfg_res['message']
              if ret['result']:
                  if property not in zonecfg_new:
                      ret['changes'][property] = None
                  elif zonecfg[property] != zonecfg_new[property]:
                      ret['changes'][property] = zonecfg_new[property]
                  if ret['comment'] == '':
                      ret['comment'] = 'The property {0} was cleared!'.format(property)
              elif ret['comment'] == '':
                  if ret['comment'] == '':
                      ret['comment'] = 'The property {0} did not get cleared!'.format(property)
          else:
              ret['result'] = True
              ret['comment'] = 'The property {0} does not exist!'.format(property)
      else:
          ## zone does not exist
          ret['result'] = False
          ret['comment'] = 'The zone {0} is not in the configured, installed, or booted state.'.format(name)
  
      return ret