code: public ListXssMatchSetsResult withXssMatchSets(XssMatchSetSummary... xssMatchSets) {
          if (this.xssMatchSets == null) {
              setXssMatchSets(new java.util.ArrayList<XssMatchSetSummary>(xssMatchSets.length));
          }
          for (XssMatchSetSummary ele : xssMatchSets) {
              this.xssMatchSets.add(ele);
          }
          return this;
      }
docs: <p>
  An array of <a>XssMatchSetSummary</a> objects.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setXssMatchSets(java.util.Collection)} or {@link #withXssMatchSets(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param xssMatchSets
  An array of <a>XssMatchSetSummary</a> objects.
  @return Returns a reference to this object so that method calls can be chained together.