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