code: public void setFrequencyCapBehavior(com.google.api.ads.admanager.axis.v201902.FrequencyCapBehavior frequencyCapBehavior) {
          this.frequencyCapBehavior = frequencyCapBehavior;
      }
docs: Sets the frequencyCapBehavior value for this AdRule.
  
  @param frequencyCapBehavior   * The {@link FrequencyCapBehavior} of the {@link AdRule}. This
  attribute is
  optional and defaults to {@link FrequencyCapBehavior#DEFER}.