code: public com.google.api.ads.adwords.axis.v201809.cm.PerformanceTarget getPerformanceTarget() {
          return performanceTarget;
      }
docs: Gets the performanceTarget value for this CampaignGroupPerformanceTarget.
  
  @return performanceTarget   * The main configuration of the performance target.
  <span class="constraint Required">This field is required
  and should not be {@code null} when it is contained within {@link
  Operator}s : ADD, SET.</span>