docs: def _get_subnetname_id(subnetname):
      '''
      Returns the SubnetId of a SubnetName to use
      '''
      params = {'Action': 'DescribeSubnets'}
      for subnet in aws.query(params, location=get_location(),
                 provider=get_provider(), opts=__opts__, sigver='4'):
          tags = subnet.get('tagSet', {}).get('item', {})
          if not isinstance(tags, list):
              tags = [tags]
          for tag in tags:
              if tag['key'] == 'Name' and tag['value'] == subnetname:
                  log.debug(
                      'AWS Subnet ID of %s is %s',
                      subnetname, subnet['subnetId']
                  )
                  return subnet['subnetId']
      return None