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