docs: def append(name, family='ipv4', **kwargs):
      '''
      .. versionadded:: 0.17.0
  
      Append a rule to a chain
  
      name
          A user-defined name to call this rule by in another part of a state or
          formula. This should not be an actual rule.
  
      family
          Network family, ipv4 or ipv6.
  
      All other arguments are passed in with the same name as the long option
      that would normally be used for nftables, with one exception: `--state` is
      specified as `connstate` instead of `state` (not to be confused with
      `ctstate`).
      '''
      ret = {'name': name,
             'changes': {},
             'result': None,
             'comment': ''}
  
      for ignore in _STATE_INTERNAL_KEYWORDS:
          if ignore in kwargs:
              del kwargs[ignore]
      res = __salt__['nftables.build_rule'](family=family, **kwargs)
      if not res['result']:
          return res
      rule = res['rule']
  
      res = __salt__['nftables.build_rule'](full=True, family=family, command='add', **kwargs)
      if not res['result']:
          return res
      command = res['rule']
  
      res = __salt__['nftables.check'](kwargs['table'],
                                       kwargs['chain'],
                                       rule,
                                       family)
      if res['result']:
          ret['result'] = True
          ret['comment'] = 'nftables rule for {0} already set ({1}) for {2}'.format(
              name,
              command.strip(),
              family)
          return ret
      if 'test' in __opts__ and __opts__['test']:
          ret['comment'] = 'nftables rule for {0} needs to be set ({1}) for {2}'.format(
              name,
              command.strip(),
              family)
          return ret
      res = __salt__['nftables.append'](kwargs['table'],
                                        kwargs['chain'],
                                        rule,
                                        family)
      if res['result']:
          ret['changes'] = {'locale': name}
          ret['result'] = True
          ret['comment'] = 'Set nftables rule for {0} to: {1} for {2}'.format(
              name,
              command.strip(),
              family)
          if 'save' in kwargs:
              if kwargs['save']:
                  __salt__['nftables.save'](filename=None, family=family)
                  ret['comment'] = ('Set and Saved nftables rule for {0} to: '
                                    '{1} for {2}'.format(name, command.strip(), family))
          return ret
      else:
          ret['result'] = False
          ret['comment'] = ('Failed to set nftables rule for {0}.\n'
                            'Attempted rule was {1} for {2}.\n'
                            '{3}').format(
                                    name,
                                    command.strip(), family, res['comment'])
          return ret