code: public ListOfferingPromotionsResult withOfferingPromotions(OfferingPromotion... offeringPromotions) {
          if (this.offeringPromotions == null) {
              setOfferingPromotions(new java.util.ArrayList<OfferingPromotion>(offeringPromotions.length));
          }
          for (OfferingPromotion ele : offeringPromotions) {
              this.offeringPromotions.add(ele);
          }
          return this;
      }
docs: <p>
  Information about the offering promotions.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setOfferingPromotions(java.util.Collection)} or {@link #withOfferingPromotions(java.util.Collection)} if
  you want to override the existing values.
  </p>
  
  @param offeringPromotions
  Information about the offering promotions.
  @return Returns a reference to this object so that method calls can be chained together.