code: public com.google.api.ads.adwords.axis.v201809.rm.UserListLogicalRuleOperator getOperator() {
          return operator;
      }
docs: Gets the operator value for this UserListLogicalRule.
  
  @return operator   * The logical operator of the rule.
  <span class="constraint Required">This field is required
  and should not be {@code null}.</span>