docs: public BrokerNodeGroupInfo withClientSubnets(String... clientSubnets) {
          if (this.clientSubnets == null) {
              setClientSubnets(new java.util.ArrayList<String>(clientSubnets.length));
          }
          for (String ele : clientSubnets) {
              this.clientSubnets.add(ele);
          }
          return this;
      }