code: public java.util.List<PurchaseRequest> getPurchaseRequests() {
          if (purchaseRequests == null) {
              purchaseRequests = new com.amazonaws.internal.SdkInternalList<PurchaseRequest>();
          }
          return purchaseRequests;
      }
docs: <p>
  The purchase requests.
  </p>
  
  @return The purchase requests.