code: public void setDomainLimitRate(String domain, int limitRate) {
          SetDomainLimitRateRequest request = new SetDomainLimitRateRequest()
                  .withDomain(domain)
                  .withLimitRate(limitRate);
          setDomainLimitRate(request);
      }
docs: Set the rate limit of specified domain acceleration.
  
  @param domain Name of the domain.
  @param limitRate The limit of downloading rate, in Bytes/s.