docs: public ListChannelsResult withChannelSummaries(ChannelSummary... channelSummaries) {
          if (this.channelSummaries == null) {
              setChannelSummaries(new java.util.ArrayList<ChannelSummary>(channelSummaries.length));
          }
          for (ChannelSummary ele : channelSummaries) {
              this.channelSummaries.add(ele);
          }
          return this;
      }