code: public com.google.api.ads.adwords.axis.v201809.rm.CombinedRuleUserListRuleOperator getRuleOperator() {
          return ruleOperator;
      }
docs: Gets the ruleOperator value for this CombinedRuleUserList.
  
  @return ruleOperator   * <span class="constraint Required">This field is required and
  should not be {@code null} when it is contained within {@link Operator}s
  : ADD.</span>