code: def id_pools_ipv4_subnets(self):
          
          if not self.__id_pools_ipv4_subnets:
              self.__id_pools_ipv4_subnets = IdPoolsIpv4Subnets(self.__connection)
          return self.__id_pools_ipv4_subnets
docs: Gets the IdPoolsIpv4Subnets API client.
  
          Returns:
              IdPoolsIpv4Subnets: