code: public ListBrokersResult withBrokerSummaries(BrokerSummary... brokerSummaries) {
          if (this.brokerSummaries == null) {
              setBrokerSummaries(new java.util.ArrayList<BrokerSummary>(brokerSummaries.length));
          }
          for (BrokerSummary ele : brokerSummaries) {
              this.brokerSummaries.add(ele);
          }
          return this;
      }
docs: A list of information about all brokers.
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setBrokerSummaries(java.util.Collection)} or {@link #withBrokerSummaries(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param brokerSummaries
  A list of information about all brokers.
  @return Returns a reference to this object so that method calls can be chained together.