docs: public DescribeBrokerResult withBrokerInstances(BrokerInstance... brokerInstances) {
          if (this.brokerInstances == null) {
              setBrokerInstances(new java.util.ArrayList<BrokerInstance>(brokerInstances.length));
          }
          for (BrokerInstance ele : brokerInstances) {
              this.brokerInstances.add(ele);
          }
          return this;
      }