code: public TraceSummary withFaultRootCauses(FaultRootCause... faultRootCauses) {
          if (this.faultRootCauses == null) {
              setFaultRootCauses(new java.util.ArrayList<FaultRootCause>(faultRootCauses.length));
          }
          for (FaultRootCause ele : faultRootCauses) {
              this.faultRootCauses.add(ele);
          }
          return this;
      }
docs: <p>
  A collection of FaultRootCause structures corresponding to the the trace segments.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setFaultRootCauses(java.util.Collection)} or {@link #withFaultRootCauses(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param faultRootCauses
  A collection of FaultRootCause structures corresponding to the the trace segments.
  @return Returns a reference to this object so that method calls can be chained together.