code: public java.util.List<String> getRegionOrder() {
          if (regionOrder == null) {
              regionOrder = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return regionOrder;
      }
docs: <p>
  The order of the regions in where you want to perform the stack operation.
  </p>
  
  @return The order of the regions in where you want to perform the stack operation.