code: public DescribeTargetGroupsRequest withTargetGroupArns(String... targetGroupArns) {
          if (this.targetGroupArns == null) {
              setTargetGroupArns(new java.util.ArrayList<String>(targetGroupArns.length));
          }
          for (String ele : targetGroupArns) {
              this.targetGroupArns.add(ele);
          }
          return this;
      }
docs: <p>
  The Amazon Resource Names (ARN) of the target groups.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setTargetGroupArns(java.util.Collection)} or {@link #withTargetGroupArns(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param targetGroupArns
  The Amazon Resource Names (ARN) of the target groups.
  @return Returns a reference to this object so that method calls can be chained together.