code: def get_all_vpn_connections(self, vpn_connection_ids=None, filters=None):
          
          params = {}
          if vpn_connection_ids:
              self.build_list_params(params, vpn_connection_ids, 'Vpn_ConnectionId')
          if filters:
              i = 1
              for filter in filters:
                  params[('Filter.%d.Name' % i)] = filter[0]
                  params[('Filter.%d.Value.1')] = filter[1]
                  i += 1
          return self.get_list('DescribeVpnConnections', params, [('item', VpnConnection)])
docs: Retrieve information about your VPN_CONNECTIONs.  You can filter results to
          return information only about those VPN_CONNECTIONs that match your search
          parameters.  Otherwise, all VPN_CONNECTIONs associated with your account
          are returned.
  
          :type vpn_connection_ids: list
          :param vpn_connection_ids: A list of strings with the desired VPN_CONNECTION ID's
  
          :type filters: list of tuples
          :param filters: A list of tuples containing filters.  Each tuple
                          consists of a filter key and a filter value.
                          Possible filter keys are:
  
                          - *state*, the state of the VPN_CONNECTION
                            pending,available,deleting,deleted
                          - *type*, the type of connection, currently 'ipsec.1'
                          - *customerGatewayId*, the ID of the customer gateway
                            associated with the VPN
                          - *vpnGatewayId*, the ID of the VPN gateway associated
                            with the VPN connection
  
          :rtype: list
          :return: A list of :class:`boto.vpn_connection.vpnconnection.VpnConnection`