code: def associate_route_table(self, route_table_id, subnet_id):
          
          params = {
              'RouteTableId': route_table_id,
              'SubnetId': subnet_id
          }
  
          result = self.get_object('AssociateRouteTable', params, ResultSet)
          return result.associationId
docs: Associates a route table with a specific subnet.
  
          :type route_table_id: str
          :param route_table_id: The ID of the route table to associate.
  
          :type subnet_id: str
          :param subnet_id: The ID of the subnet to associate with.
  
          :rtype: str
          :return: The ID of the association created