docs: def get_policy(table='filter', chain=None, family='ipv4'):
      '''
      Return the current policy for the specified table/chain
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' iptables.get_policy filter INPUT
  
          IPv6:
          salt '*' iptables.get_policy filter INPUT family=ipv6
      '''
      if not chain:
          return 'Error: Chain needs to be specified'
  
      rules = _parse_conf(in_mem=True, family=family)
      try:
          return rules[table][chain]['policy']
      except KeyError:
          return None