code: public GetTraceSummariesResult withTraceSummaries(TraceSummary... traceSummaries) {
          if (this.traceSummaries == null) {
              setTraceSummaries(new java.util.ArrayList<TraceSummary>(traceSummaries.length));
          }
          for (TraceSummary ele : traceSummaries) {
              this.traceSummaries.add(ele);
          }
          return this;
      }
docs: <p>
  Trace IDs and metadata for traces that were found in the specified time frame.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setTraceSummaries(java.util.Collection)} or {@link #withTraceSummaries(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param traceSummaries
  Trace IDs and metadata for traces that were found in the specified time frame.
  @return Returns a reference to this object so that method calls can be chained together.