code: public com.google.api.ads.adwords.axis.v201809.rm.RuleItem[] getItems() {
          return items;
      }
docs: Gets the items value for this RuleItemGroup.
  
  @return items   * Before version V201705, rule items are ANDed together.
  Starting from version V201705, rule items will be
  grouped together based on
  {@link Rule#getRuleType()}.
  <span class="constraint CollectionSize">The minimum
  size of this collection is 1. The maximum size of this collection
  is 1000.</span>
  <span class="constraint ContentsDistinct">This field
  must contain distinct elements.</span>
  <span class="constraint ContentsNotNull">This field
  must not contain {@code null} elements.</span>
  <span class="constraint Required">This field is required
  and should not be {@code null}.</span>